Scientists have found that a specific mutation, known as 614G, which was first spotted in China in early January and then spread quickly throughout Europe and NY city, made the pandemic harder to stop.
The drug maker Pfizer said on Wednesday that its coronavirus vaccine had no serious side effects, the first step of complete results from a late stage vaccine trial. The data showed that the vaccine prevented mild and servere forms of COVID-19
Across the United States, at least 200,000 more people have died than usual since March, according to a New York Times analysis of estimates from the Centers for Disease Control and Prevention. This is about 60,000 higher than the number of deaths that have been directly linked to the coronavirus.
Scientists who have been monitoring immune responses to the virus are now starting to see encouraging signs of strong, lasting immunity, even in people who developed only mild symptoms of Covid-19, a flurry of new studies suggests.
A flurry of recent studies has shown that people with extra weight are more susceptible than others to severe bouts of disease. And experiments in animals and human cells have demonstrated how excess fat can disrupt the immune system.