In what is believed to be the first published study of COVID-19 vaccine effectiveness in long-term care facilities such as nursing homes, a research team co-led […]
Countries where COVID-19 vaccines have rolled out quickly, such as Israel and the UK, are starting to give an indication of how well they work. Their […]
A few “super carriers” with off-the-charts viral loads are likely responsible for the bulk of COVID-19 transmissions, while about half of infected people aren’t contagious at […]