In the Lab Natalya Ortolano Experimental HIV drug seems effective at a twice-a-year dose, study finds
In the Lab Andrew Joseph What a koala virus tells us about the human genome — and how it defends itself against viral invasions
Health Andrew Joseph Where hepatitis C rates are seven times the US average — and a cure is kept out of reach
Health Helen Branswell Patient Zero in AIDS crisis was misidentified, study says, rewriting early history of virus
In the Lab Shayla Love Genetic fossil-hunters dig through HIV’s long history for clues to new treatments
Quick Take Ike Swetlitz A serious stomach bug: Norovirus costs billions of dollars of lost productivity
In the Lab Helen Branswell A disease detective hunts pathogens with a photographic memory — and a genius mind
Health Associated Press Worry over Zika virus leads El Salvador to urge two-year delay in pregnancies