COVID-19 transmission from so-called “breakthrough infections” may be significantly lower than was earlier suggested. Experts say that they have looked at multiple studies on vaccinated people who’ve developed COVID-19 and have come to the conclusion that the Centers for Disease Control and Prevention (CDC) guidance on transmission from breakthrough cases may have been overstated.

A spokesman for Dr. Fauci says he has been “entirely truthful,” but a new letter belatedly acknowledging the National Institutes of Health’s support for virus-enhancing research adds more heat to the ongoing debate over whether a lab leak could have sparked the pandemic.

The treatment reduced the risk of reaching mechanical ventilation by 44%. ICU admissions were lower by 43%, and an overall in-hospital mortality saw a 47% decrease.

A new study co-led by Yale School of Public Health faculty has found that natural infection by the virus offers little long-term protection against reinfection.

Anew COVID variant that infected vaccinated residents and staff at a Kentucky nursing home has been detected in 47 U.S. states, according to data. The R.1 variant spread through 45 residents and staff at the nursing home after an unvaccinated staff member triggered the infections in March, the Kentucky Department of Public Health revealed.

A new Yale-led study finds that immune system activity jump-started by rhinovirus exposure could prevent or treat the early stages of COVID-19 infection.

One silver lining to the covid-19 pandemic has been the speed with which effective vaccines have been developed. Victims of other pandemics have not been so lucky. Three decades of attempts to create a vaccine against hiv, the virus that causes aids, have proved fruitless. The latest setback came on August 31st, when an experimental vaccine produced by Johnson & Johnson, an American pharmaceutical firm, flunked a clinical trial. One obstacle is hiv’s genetic slipperiness. The virus has a high mutation rate, which helps it adapt to evade both natural immune systems and artificial vaccines.

The CEO of Pfizer, Albert Bourla, told Fox News he thought a vaccine-resistant coronavirus variant would emerge "one day."

A key amino-acid change might underlie the coronavirus variant’s ferocious infectivity. As the world grapples with the hyper-infectious Delta coronavirus variant, scientists are racing to understand the biological basis for its behaviour.

Before 2020, many of us had never heard of mRNA. With the development of Covid-19 vaccines dependent on this molecule, though, mention of it was all over the news. In early August, the US reached the milestone of 70 percent of adults having received at least one dose of the vaccine. Covid was the first disease mRNA therapeutics tackled, and given the success of the Pfizer and Moderna vaccines at preventing severe cases of the virus, it won’t be the last.

Investigators in Chile conclude that the lambda COVID-19 variant is not only more infectious than standard SARS-CoV-2, but could also possibly shrug off vaccines. The first case in the United States has been spotted at Houston Methodist Hospital.

A full course of two of the most widely available coronavirus vaccines is about as effective against the more contagious delta variant as it was against a previously dominant version of the virus, according to a study published in the New England Journal of Medicine.

Many factors influence our risk of illness from SARS-CoV-2, the coronavirus responsible for COVID-19. That includes being careful to limit our possible exposures to the virus, as well as whether we have acquired immunity from a vaccine or an earlier infection. But once a person is infected, a host of other biological factors, including age and pre-existing medical conditions, will influence one’s risk of becoming severely ill.

Scientists have harnessed CRISPR gene-editing technology to block the replication of the novel coronavirus in human cells — an approach that could one day serve as a new treatment for COVID-19.

To date, there are no effective antidotes against most viral infections. An interdisciplinary research team at the Technical University of Munich (TUM) has now developed a new approach: they engulf and neutralize viruses with nano-capsules tailored from genetic material using the DNA origami method.

Some Canadians are experiencing more intense reactions after a second dose of a COVID-19 vaccine, and experts say that’s to be expected. The usual side effects people feel after vaccines, including fever, soreness, and headache, can feel stronger following the second dose. That’s been the case for many people around the world.

China emulated US techniques to construct novel coronaviruses in unsafe conditions.

A new map shows how human actions are affecting outbreak risks, sometimes in surprising places, which could be a valuable tool in preventing the next pandemic.

A few dozen human genes rapidly evolved in ancient East Asia to thwart coronavirus infections, scientists say. Those genes could be crucial to today’s pandemic.

A coronavirus epidemic broke out in East Asia around 25,000 years ago, and the evidence is in our genes. Researchers say the finding could shed light on how to fight COVID-19.