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