When SARS-CoV-2 was a brand-new virus, it met little resistance in immune-naïve hosts—that is, us. Vaccines, boosters, and infections have increased our immunity to varying degrees. But how much ...

There are several basic types of vaccines being developed to battle COVID. Across the globe, scientists are scrambling to develop multiple vaccines with the goal of stopping the deadly coronavirus in ...

How the United States' potential fourth vaccine stacks up against existing ones. Maryland-based biotech company Novavax said Monday that its COVID-19 vaccine was shown to be highly effective in ...

In the quest to design a better COVID-19 vaccine, scientists are attempting to hit a moving target. Vaccine researchers are working to reformulate the existing vaccines to be effective against ...

Convalescent plasma – a once-celebrated treatment for Covid-19 that has largely fallen out of favor – does work well for people who are immune-compromised, according to a study published Thursday. The ...

With an effective COVID-19 vaccine developed and out in the world, the next step for scientists is to “fine tune” booster shots. Current COVID-19 vaccine efficacy wanes over time, leading experts to ...

Ducharme is a contributor to TIME. Ducharme is a contributor to TIME. These days, many people use at-home COVID-19 tests when they feel ill, rather than going out to get tested by a professional.

With Covid-19 cases up across the country, many people are once again relying on home tests to guide decisions about going to work and sending their kids to school and other activities. A lot of those ...