New York Times: Is the Coronavirus Getting Better at Airborne Transmission?

New York Times: Is the Coronavirus Getting Better at Airborne Transmission?. “Most researchers now agree that the coronavirus is mostly transmitted through large droplets that quickly sink to the floor and through much smaller ones, called aerosols, that can float over longer distances indoors and settle directly into the lungs, where the virus is most harmful. The new studies don’t fundamentally change that view. But the findings signal the need for better masks in some situations, and indicate that the virus is changing in ways that make it more formidable.”

Scientific American: Why We Need to Upgrade Our Face Masks—and Where to Get Them

Scientific American: Why We Need to Upgrade Our Face Masks—and Where to Get Them. “There is now a cornucopia of high-filtration respirator-style masks on the market, including N95s, Chinese-made KN95s and South Korean–made KF94s. They have been widely available and relatively affordable for months and provide better protection than cloth or surgical masks. Yet it was not until September 10 that the CDC finally updated its guidance to say the general public could wear N95s and other medical-grade masks now that they are in sufficient supply.”

CNN: What the data reveals about children and Covid-19 in the US

CNN: What the data reveals about children and Covid-19 in the US. “Contrary to research early in the pandemic, children are just as likely to become infected as adults. According to the CDC, Covid-19 infection rates for adolescents aged 5 to 17 were as high as in adults 18 to 49, and higher than rates in adults over 50. There have been 4.8 million cases of Covid-19 in children since April 2020, according to the American Association of Pediatrics, making up about 15% of all documented cases in the United States. In the last month, the number of new weekly cases has surged to near-peak levels.”

University of Georgia: Symptomatic COVID patients are more contagious

University of Georgia: Symptomatic COVID patients are more contagious. “Individuals with COVID-19 are most likely to spread the virus to close contacts two days before the onset of symptoms to three days after symptoms appear, and the risk of transmission is highest when patients had mild or moderate disease severity, according to a new study by researchers at the University of Georgia. The study, which was published this week in JAMA Internal Medicine, supports the idea that if a person with COVID-19 is sicker, they are more contagious compared to asymptomatic cases.”

Science: Airborne transmission of respiratory viruses

Science: Airborne transmission of respiratory viruses. “Wang et al. review recent advances in understanding airborne transmission gained from studying the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections and other respiratory pathogens. The authors suggest that airborne transmission may be the dominant form of transmission for several respiratory pathogens, including SARS-CoV-2, and that further understanding of the mechanisms underlying infection from the airborne route will better inform mitigation measures.”

Photos tweeted by UNC-Chapel Hill spark concern over virus; university steps up testing of unvaccinated students (WRAL)

WRAL: Photos tweeted by UNC-Chapel Hill spark concern over virus; university steps up testing of unvaccinated students. “The Twitter post shows students lining up to take part in a university tradition – drinking water from the Old Well on campus on the first day of classes. The students waiting in line were wearing masks, but dozens of people commented, expressing concern that everyone was drinking from the same fountain while the highly contagious coronavirus Delta variant spreads.”

Study: Fully vaccinated people with “breakthrough” COVID Delta infections carry as much virus as the unvaccinated (CBS News)

CBS News: Study: Fully vaccinated people with “breakthrough” COVID Delta infections carry as much virus as the unvaccinated. “A study by University of Oxford scientists has found that people who contract the Delta variant of COVID-19 after being fully vaccinated carry a similar amount of the coronavirus as those who catch the disease and have not been inoculated. The researchers stressed that vaccination still offers good protection against catching the disease in the first place, and protects against getting seriously ill with it.”

Newswise: More than one in ten COVID-19 patients infected in hospital in first pandemic wave

Newswise: More than one in ten COVID-19 patients infected in hospital in first pandemic wave. “The researchers examined records of COVID-19 patients in UK hospitals enrolled in the International Severe Acute Respiratory and emerging Infections Consortium (ISARIC) Clinical Characterisation Protocol UK (CCP-UK) study, who became ill before 1st August 2020. They found that at least 11.1% of COVID-19 patients in 314 UK hospitals were infected after admission. The proportion of COVID-19 patients infected in hospital also rose to between 16% and 20% in mid-May 2020, long after the peak of admissions in the first wave.”

BuzzFeed News: A Cape Cod COVID Outbreak Shows The Delta Variant May Be Even More Infectious Than We Thought, The CDC Says

BuzzFeed News: A Cape Cod COVID Outbreak Shows The Delta Variant May Be Even More Infectious Than We Thought, The CDC Says. “The CDC’s about-face recommendation this week that vaccinated people in high-risk areas should resume wearing masks in indoor public spaces was spurred by new data that showed that even vaccinated people infected with the Delta variant can spread it, the agency said Friday. The data analyzed a large outbreak of COVID-19 cases among vaccinated beachgoers in Cape Cod, Massachusetts, over the July 4th holiday.”

CNBC: Delta variant is one of the most infectious respiratory diseases known, CDC director says

CNBC: Delta variant is one of the most infectious respiratory diseases known, CDC director says. “The delta Covid variant is one of the most infectious respiratory diseases ever seen by scientists, the director of the Centers for Disease Control and Prevention said Thursday. The variant is highly contagious, largely because people infected with the delta strain can carry up to 1,000 times more virus in their nasal passages than those infected with the original strain, according to new data.”