While the Johnson & Johnson vaccine has been linked to a possible increased risk of certain rare adverse events, the vaccine is still safe to use.

Vaccines produce a strong and consistent immune response that works even against the new delta variant.

Masks help prevent the spread of SARS-CoV-2, the virus that causes COVID-19, yet masking policies in the west have featured some spectacular policy wrong turns.

Vaccination with two doses helps prevent infection, and in those that do still get infected, lessens the impact of the virus by reducing disease severity, transmission of infection and death. Even...

It is increasingly likely that we will all need to show evidence of our COVID-19 vaccination status in order to travel, access public events and perhaps even attend workplaces.

Lambda has now gone globetrotting. According to a recent World Health Organization (WHO) report, it has been found in 29 countries. Many scientists speak of lambda’s “unusual combination” of...

Whether we should continue with school bubbles or adopt more targeted testing depends on an ethical judgment about what matters more: minimizing the impact on education or minimizing the spread of...

The novel coronavirus and norovirus have similar traits. The latter can be asymptomatic in some people, and mutates rapidly. As it spreads around, norovirus sometimes changes so much that standard...

Many blame the relatively lower vaccination rates in communities of color on “vaccine hesitancy.” But this label overlooks persistent barriers to access and lumps together the varied reasons people...

A booster shot may be necessary to maintain COVID-19 immunity. The shot reminds your immune system of the pathogen it’s been immunized against.

Pandemic or no pandemic, it is always important to take great care of your health. Aside from protecting yourself from COVID-19, this is to also ward off other illnesses, especially during flu...

Sequencing the genetic code of virus samples taken from COVID-19 patients reveals how SARS-CoV-2 is spreading and changing.