Researchers from Tel Aviv University (TAU) have proven that the coronavirus can be killed efficiently, quickly, and cheaply using ultraviolet (UV) light-emitting diodes (UV-LEDs). They believe that the UV-LED technology will soon be available for private and commercial use.
This is the first study conducted on the disinfection efficiency of UV-LED irradiation at different wavelengths or frequencies on a virus from the family of coronaviruses. The study was led by Professor Hadas Mamane, Head of the Environmental Engineering Program at TAU’s School of Mechnical Engineering, Iby and Aladar Fleischman Faculty of Engineering. The article was published in November 2020 issue of the Journal of Photochemistry and Photobiology B: Biology.
“The entire world is currently looking for effective solutions to disinfect the coronavirus,” said Professor Mamane. “The problem is that in order to disinfect a bus, train, sports hall, or plane by chemical spraying, you need physical manpower, and in order for the spraying to be effective, you have to give the chemical time to act on the surface. Disinfection systems based on LED bulbs, however, can be installed in the ventilation system and air conditioner, for example, and sterilize the air sucked in and then emitted into the room.
“We discovered that it is quite simple to kill the coronavirus using LED bulbs that radiate ultraviolet light,” she explained. “We killed the viruses using cheaper and more readily available LED bulbs, which consume little energy and do not contain mercury like regular bulbs. Our research has commercial and societal implications, given the possibility of using such LED bulbs in all areas of our lives, safely and quickly.”
I have to confess that as much as I enjoy riding my bike everyday, the fact that I live on the Chicago Lakefront and have beautiful Lake Michigan is no small consideration. There are also trees and various wildlife available, too.
A study published in Ecological Applications suggests that nature around one’s home may help mitigate some of the negative mental health effects of the COVID-19 pandemic.
An online questionnaire survey completed by 3,000 adults in in Tokyo, Japan, quantified the link between five mental-health outcomes (depression, life satisfaction, subjective happiness, self-esteem, and loneliness) and two measures of nature experiences (frequency of green space use and green view through windows from home).
More frequent green space use and the existence of green window views from the home were associated with increased levels of self-esteem, life satisfaction, and subjective happiness, as well as decreased levels of depression and loneliness.
“Our results suggest that nearby nature can serve as a buffer in decreasing the adverse impacts of a very stressful event on humans,” said lead author Masashi Soga, PhD, of The University of Tokyo. “Protecting natural environments in urban areas is important not only for the conservation of biodiversity, but also for the protection of human health.”
I have been writing this blog since March 2010. There are approximately 4000 posts in here. Without a doubt, one of the most incendiary topics in that entire time is … flu shots. I get one every year. My doctor tells me to. I listen to her and I got one on Friday. I think you should, too. In view of the pandemic it is even more important.
As the flu season approaches in the United States, health experts are warning that the addition of another respiratory illness on top of the ongoing COVID-19 pandemic could overburden the health care system, strain testing capacity, and increase the risk of catching both diseases at once, according to the University of California San Francisco.
In a bad flu season, which peaks from December to February, 40 million to 50 million Americans may catch the flu, with some 800,000 requiring hospitalization, according to Charles Chiu, MD, PhD, an infectious disease expert at UC San Francisco.
“So the worry is that with the onset of the flu season, you’re going to get peaks of flu and COVID-19 cases at the same time,” he said. “Even with a mild flu season, the convergence with a COVID surge could very rapidly overwhelm our hospital system.”
Unlike COVID-19, however, the flu is a familiar foe, and a safe and effective vaccine is available every year.
Studies indicate that homemade masks help combat the spread of viruses like COVID-19 when combined with frequent hand-washing and physical distancing. Many of these studies focus on the transfer of tiny aerosol particles; however, researchers say that speaking, coughing and sneezing generates larger droplets that carry virus particles. Because of this, mechanical engineer Taher Saif said the established knowledge may not be enough to determine the effectiveness of some fabrics used in homemade masks.
Saif, a mechanical science and engineering professor at the University of Illinois, Urbana-Champaign, led a study that examined the effectiveness of common household fabrics in blocking droplets. The findings are published in the journal Extreme Mechanics Letters.
Collateral damage from the coronavirus continues to mount. Researchers have identified specific sub-populations of brain cells in the prefrontal cortex, a key part of the brain that regulates social behavior, that are required for normal sociability in adulthood and are profoundly vulnerable to juvenile social isolation in mice.
Loneliness is recognized as a serious threat to mental health. Even as our world becomes increasingly connected over digital platforms, young people in our society are feeling a growing sense of isolation. The COVID-19 pandemic, which forced many countries to implement social distancing and school closures, magnifies the need for understanding the mental health consequences of social isolation and loneliness. While research has shown that social isolation during childhood, in particular, is detrimental to adult brain function and behavior across mammalian species, the underlying neural circuit mechanisms have remained poorly understood.
One of my biggest problems in dealing with Covid-19 has been sorting out the information that we are deluged with on a daily basis. I thought this explanation from the Sbarro Health Research Organization was a help.
Not long after the Coronavirus disease (Covid-19) outbreak in China, Italy was hard-hit by the infection and rapidly became one of the countries with the highest mortality rate. The disease was first detected on February 20 in Lombardy, a region in the Northern area, and rapidly spread throughout the country. The Southern regions and the Islands, however, registered much lower infection rates even though a massive migration from the affected regions to the South was recorded before the national lockdown.
What spared the South of Italy from such a heavy disease burden? Various reasons have been proposed including that milder climate conditions in the South could have helped to prevent viral spreading, but none so far convincingly explained the different incidence rates throughout the country.
Respiratory droplets from a cough or sneeze travel farther and last longer in humid, cold climates than in hot, dry ones, according to a study on droplet physics by an international team of engineers. The researchers incorporated this understanding of the impact of environmental factors on droplet spread into a new mathematical model that can be used to predict the early spread of respiratory viruses including COVID-19, and the role of respiratory droplets in that spread.
The team developed this new model to better understand the role that droplet clouds play in the spread of respiratory viruses. Their model is the first to be based on a fundamental approach taken to study chemical reactions called collision rate theory, which looks at the interaction and collision rates of a droplet cloud exhaled by an infected person with healthy people. Their work connects population-scale human interaction with their micro-scale droplet physics results on how far and fast droplets spread, and how long they last.r
Their results were published June 30 in the journal Physics of Fluids.
“The basic fundamental form of a chemical reaction is two molecules are colliding. How frequently they’re colliding will give you how fast the reaction progresses,” said Abhishek Saha, a professor of mechanical engineering at the University of California San Diego, and one of the authors of the paper. “It’s exactly the same here; how frequently healthy people are coming in contact with an infected droplet cloud can be a measure of how fast the disease can spread.”
They found that, depending on weather conditions, some respiratory droplets travel between 8 feet and 13 feet away from their source before evaporating, without even accounting for wind. This means that without masks, six feet of social distance may not be enough to keep one person’s exhalated particles from reaching someone else.
“Droplet physics are significantly dependent on weather,” said Saha. “If you’re in a colder, humid climate, droplets from a sneeze or cough are going to last longer and spread farther than if you’re in a hot dry climate, where they’ll get evaporated faster. We incorporated these parameters into our model of infection spread; they aren’t included in existing models as far as we can tell.”
The researchers hope that their more detailed model for rate of infection spread and droplet spread will help inform public health policies at a more local level, and can be used in the future to better understand the role of environmental factors in virus spread.
They found that at 35C (95F) and 40 percent relative humidity, a droplet can travel about 8 feet. However, at 5C (41F) and 80 percent humidity, a droplet can travel up to 12 feet. The team also found that droplets in the range of 14-48 microns possess higher risk as they take longer to evaporate and travel greater distances. Smaller droplets, on the other hand, evaporate within a fraction of a second, while droplets larger than 100 microns quickly settle to the ground due to weight.
This is further evidence of the importance of wearing masks, which would trap particles in this critical range.
The team of engineers from the UC San Diego Jacobs School of Engineering, University of Toronto and Indian Institute of Science are all experts in the aerodynamics and physics of droplets for applications including propulsion systems, combustion or thermal sprays. They turned their attention and expertise to droplets released when people sneeze, cough or talk when it became clear that COVID-19 is spread through these respiratory droplets. They applied existing models for chemical reactions and physics principles to droplets of a salt water solution–saliva is high in sodium chloride–which they studied in an ultrasonic levitator to determine the size, spread, and lifespan of these particles in various environmental conditions.
Many current pandemic models use fitting parameters to be able to apply the data to an entire population. The new model aims to change that.
“Our model is completely based on “first principles” by connecting physical laws that are well understood, so there is next to no fitting involved,” said Swetaprovo Chaudhuri, professor at University of Toronto and a co-author. “Of course, we make idealized assumptions, and there are variabilities in some parameters, but as we improve each of the submodels with specific experiments and including the present best practices in epidemiology, maybe a first principles pandemic model with high predictive capability could be possible.”
There are limitations to this new model, but the team is already working to increase the model’s versatility.
“Our next step is to relax a few simplifications and to generalize the model by including different modes of transmission,” said Saptarshi Basu, professor at the Indian Institute of Science and a co-author. “A set of experiments are also underway to investigate the respiratory droplets that settle on commonly touched surfaces.”
Fatty food may feel like a friend during these troubled times, but new research suggests that eating just one meal high in saturated fat can hinder our ability to concentrate — not great news for people whose diets have gone south while they’re working at home during the COVID-19 pandemic.
The study compared how 51 women performed on a test of their attention after they ate either a meal high in saturated fat or the same meal made with sunflower oil, which is high in unsaturated fat.
Despite reports that children and young people may be less likely to get coronavirus disease 2019 (COVID-19) than older adults, there may be substantial indirect adverse effects of the disease on their physical and mental health, according to an analysis in CMAJ (Canadian Medical Association Journal).
“While children and young people seem rarely to be victims of severe COVID-19, we should anticipate that they will experience substantial indirect physical, social and mental health effects related to reduced access to health care and general pandemic control measures,” says Dr. Neil Chanchlani, University of Exeter, United Kingdom.
The authors describe a range of potential adverse effects and contributing factors as well as mitigation strategies for health care providers and health systems.
In the wake of widespread social distancing and isolation due to the COVID-19 pandemic, people who have pets have gained a greater appreciation for the unconditional love and companionship they provide. However, for many older adults, especially those living with Alzheimer’s disease and/or related dementias (ADRD), caring for a pet is difficult. Moreover, because of the pandemic, people with ADRD and their caregivers remain alone for extended periods of time.
Researchers from Florida Atlantic University’s Christine E. Lynn College of Nursing provide the “purr-fect” solution to comfort and engage older adults with ADRD – interactive robotic cats. Designed to respond to motion, touch and sound, these interactive robotic pets offer an alternative to traditional pet therapy. Robotic cats and dogs are usually given to people with ADRD, but data has shown that using these pets to decrease social isolation for older adults is highly successful.
Older adults with COVID-19 who survive hospitalizations and return to their homes confront substantial health challenges and an unpredictable future. Early evidence suggests that complex and long-term physical, functional, cognitive, and emotional negative health consequences will be the norm for them. However, the trajectories of health care needs of older adults with COVID-19 in the weeks and months following hospital discharge have yet to be identified.
In an article in the Journal of Aging and Social Policy, three researchers from the University of Pennsylvania School of Nursing (Penn Nursing) explain how the core components of the Transitional Care Model, along with early findings regarding the unique concerns of those with COVID-19, suggest a path for immediate practice and policy responses to caring for this population as they transition from the hospital back to the community.
They worked in hospitals hundreds of miles from the epicenter of COVID-19. Their city of 24 million people locked down hard enough, and did enough testing, that it only had a few hundred cases of the disease.
But hundreds of young Chinese doctors in a new study still experienced a sharp drop in mood, a rise in depression and anxiety symptoms, and a doubling of their fear of workplace violence, in just the first month of the coronavirus pandemic.
As communities across the U.S. have struggled to cope with the effects of the COVID-19 pandemic, many have focused on the lack of widespread testing as a major barrier to safely reopening the country. As progress has been made on this front, concern has shifted to testing accuracy, predominantly with antibody tests, which are designed to identify prior infection.
But according to a new Dartmouth-led paper published in the New England Journal of Medicine, more emphasis should be placed on addressing the inaccuracy of diagnostic tests, which play a key role in containing the pandemic.
Everyone experiences events in their own unique way. Take the COVID-19 pandemic – please. (With apologies to Henny Youngman). Turns out there is a negative bias to most peoples’ perceptions.
The survey examined the experiences of 4,149 adults living in the United States and how the crisis is impacting their mental health, physical health, romantic relationships, encounters of prejudice.
The Chapman University National COVID-19 and Mental Health Survey provides an in-depth look at the experiences of 4,149 adults living in the United States. The study asked questions about how the COVID-19 pandemic is impacting people’s mental health, physical health, romantic relationships and encounters of prejudice and discrimination.
What Are the Effects of COVID-19 on Mental Health and Behaviors?
Conducted at the end of April 2020, survey findings revealed that most people are staying home more than normal (89%), and the majority reported feeling more stressed (61%), nervous, anxious, or on edge (60%), and feeling down, depressed, or hopeless (45%) than normal due to the effects of the COVID-19 pandemic. People attributed the changes in their health behaviors to the pandemic, with about one-third reporting eating more because of stress (37%), eating more junk food (41%) and getting less exercise (35%).
As if smoking weren’t bad enough for you, it seems the new coronavirus likes it, too.
The lungs of people who smoke may contain more of the receptors that the new coronavirus uses to invade cells. This could explain why people with the virus who also smoke appear to be particularly vulnerable to severe illness.
The majority of people who acquire SARS-CoV-2, the virus that causes COVID-19, experience mild-to-moderate symptoms and will fully recover without hospital treatment.
However, several studies suggest that people who smoke are significantly more likely than people who do not to develop a severe form of the illness.
For example, according to a recent study of COVID-19 cases in hospitals in mainland China, 11.8% of people who smoked had a nonsevere form of the disease, while 16.9% had severe disease.
To break into cells and start replicating itself, the virus latches onto a protein receptor called angiotensin-converting enzyme 2 (ACE2), which is present in the cells’ membranes.