The malaria parasite Plasmodium falciparum has greater genetic diversity than previously understood—a finding that could endanger the effectiveness of planned vaccines, according to new research published Tuesday in the Proceedings of the National Academy of Sciences.  

21 days after infection with Zika virus, the testes of infected mice were significantly smaller than those of control mice, says a new Yale study published in Science Advances. The virus’s persistence in the mice’s testicles can lead to sexual transmission and may impair…

Brazilian authorities, still reeling from Zika-response, are struggling to address the worst outbreak of yellow fever in decades. The mosquito-borne illness, deadlier than Zika, is spreading leading to fears that the disease could jump from rural to urban mosquitos.  

A new PNAS study reveals a mechanism that enables chikungunya virus—a mosquito-transmitted infection that causes severe joint pain—to infect healthy cells and determines the disease’s severity. Using neuronal cells and mouse models, Johns Hopkins Bloomberg School of Public…

A new study out of Durban, South Africa, on a rare and deadly form of TB found that most victims had contracted the disease from close contact with another victim, not as a result of treatment failure.  

For the first time, a key malaria treatment failed to cure 4 patients in the UK, signaling evolving resistance in the parasite.   All the patients had visited Africa, initially responded to therapy and were able to go home, but returned to the hospital a month later when…

Rachel Carson sparked an environmental movement by warning the overuse of pesticides like DDT was threatening ecosystems and ultimately the food humans eat.   A hero to many, Carson also became a foil for critics who have accused the US Environmental Protection Agency of…

Epidemiologists, lawyers, and others are questioning a proposed new CDC rule that expands its ability to screen, test and treat people traveling into or in the US during an Ebola-like outbreak. Proposed on August 15, 2016, the rule broadly covers communicable disease events…

Maryn McKenna provides an update on the vaccine shortage that still threatens the international campaign to eradicate the disease. The 2 manufacturers of the vaccine say that they will only be able to supply about half of the 110 million doses of injectable polio vaccine (…

Pakistan began a 5-day immunization polio campaign for under-5s in Quetta this week, following the WHO’s detection of the rare Type 2 strain in a sewer this past November.   To head off past difficulties, including violence by extremists, local officials recruited Muslim…