The immune response to the single-shot Johnson & Johnson vaccine remained robust against variants of SARS-CoV-2.

Some people with blood cancers, however, may not be as well protected.

These findings, however, may reflect regional attitudes in Utah and the surrounding area.

Disruptions in access to treatment and harm reduction services could set back effort to eliminate hep C in the U.S.

People who received a canarypox vector vaccine regimen were no less likely than placebo recipients to acquire HIV.

An extra booster dose raised antibody levels in one third of people with organ transplants, but many remain unprotected.

Previous studies of the association between tenofovir and COVID-19 outcomes in people with HIV have yielded mixed results.

Low-barrier care and access to multiple services in one place can improve outcomes for people experiencing homelessness or unstable housing.

The results challenge initial concerns that chemotherapy and other treatments were too dangerous to continue during the pandemic.

Researchers found antibodies against the virus that causes COVID-19 in blood samples collected as early as January 2020.