Liz Highleyman

This guide explains key aspects of today’s most effective hep C therapies

A list of key questions for that all-important visit to your health care provider

The CDC recommends that everyone ages 13 to 64 get a routine HIV test at least once.

Natural immunity and vaccine responses may be weaker in people with immune suppression, so they should get their second dose promptly.

COVID-19 cases, hospitalizations and deaths continue to drop in the United States, but a global pandemic cannot be defeated in one country.

The protein vaccine was 96% effective against the original SARS-CoV-2 coronavirus, but less so against new variants.

At the current pace, only about 20% of the world’s population will be vaccinated by the end of 2021.

The guidance recommends that people with HIV should receive COVID-19 vaccines regardless of their CD4 count or viral load.

The Johnson & Johnson vaccine, which is easier to store and deliver, will help speed up the coronavirus vaccine rollout.

People living with cancer are at higher risk for severe illness and death due to COVID-19.

The woman has had an undetectable viral load and a normal CD4 count for more than 12 years after stopping antiretroviral therapy.

The coronavirus vaccines are safe and should be effective even for people with advanced cancer.

Hepatitis A and E usually resolve on their own, but hepatitis B and C can cause serious liver disease, including cirrhosis and liver cancer.

Another vaccine, from Novavax, was 89% effective in a U.K. trial, but both were less potent against the South African coronavirus mutation.

A slow vaccine rollout and the emergence of new coronavirus mutations threaten progress in reducing new cases and death.