The CDC has confirmed 48 West Nile cases by June 30, far above the usual 10, with Arizona hardest hit as officials urge simple precautions over the July 4 weekend.

With 1,307 confirmed cases and a fourth province affected, the DRC's Bundibugyo outbreak is the fastest first month for Ebola on record in Africa.

The CDC has moved to its highest response level as the Congo-Uganda Ebola outbreak becomes the third largest on record. For US readers, the risk stays low.

A returning aid doctor tested positive in France. The public-health answer to the obvious question is reassuring; the picture inside Congo is not.

The last of 18 Americans exposed to hantavirus on a cruise ship left a 42-day quarantine in Omaha, with federal officials reporting no sustained spread in the U.S.

The WHO says 75 health workers have been infected and 17 have died in Congo's Bundibugyo Ebola outbreak, straining a system with about 11 medics per 10,000 people.

Authorities confirmed the deadly H5 strain of avian influenza in a migratory seabird in Western Australia, the first mainland case of a virus that has reached every other continent.

A Lancet analysis says girls vaccinated at 12 or 13 now have a close-to-zero risk of dying from cervical cancer before 30.

With 782 confirmed cases and 181 deaths reported by June 14, Congo's Ebola outbreak is now the largest caused by the Bundibugyo virus, a strain with no licensed vaccine or treatment.

New rules notified June 9 strip syrups of a decades-old exemption, so cough mixtures can no longer be bought without a prescription after children died from tainted batches.

Born in the 1960s and early 1970s, today's middle-aged Americans report more loneliness, depression and memory trouble than the generation before, a 17-country study finds.

WHO reports 676 confirmed Ebola cases and 136 deaths in eastern DR Congo, with the Bundibugyo strain now in 34 health zones and the first deaths recorded in a displacement camp.