The Sturgis Motorcycle Rally may account for 19 percent of US COVID-19 cases in August
A new study shows that valved masks and face shields offer less protection than cloth masks. A multi-layer cloth mask is a proven and effective way to mitigate the spread of COVID-19. (Pexels/)Labor Day weekend marked the unofficial end of a unique summer of social distancing and mask wearing. As fall approaches, epidemiologists and public health officials warn that even in areas that have flattened their curves, new spikes in coronavirus cases may follow in the chillier months to come. Meanwhile, drug companies are banding together to ensure any vaccine that reaches the market is safe and effective.Drug companies pledge to vet vaccines for safety and efficacy before they reach public useThe race to create a coronavirus vaccine has been unlike any other. Before the pandemic, it took years or even decades for a new vaccine to make it through clinical trials. Now, immunologists and other researchers around the world...