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Scientists quickly concluded the Zika virus was the culprit. So when Zika returned last year during Brazil’s summer months of December, January and February — when mosquitoes are most active — health officials expected another surge in microcephaly cases. But that never happened

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Micaela Delgado is a beautiful dark-eyed baby girl with a ready smile. She’s eight months old. She’s one of more than 1,000 babies already born in Puerto Rico to mothers with Zika

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The key to eliminating Zika? Since 2015, the U.S. and U.S. territories have reported 5,074 and 38,306 cases of Zika, respectively. The Zika virus is spread to people primarily through the bite of an infected Aedes aegypti mosquito

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Almost a year ago, the World Health Organization declared the Zika epidemic a global health emergency, calling for an epic campaign against a virus that few had ever heard of. As it spread to almost every country in the Western Hemisphere, scientists and health officials at every level of government swung into action, trying to understand how the infection caused birth defects and how it could be stopped

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Before the virus overwhelmed Puerto Rico, Zika already lurked in Keishla Mojica’s home. First her partner, John Rodríguez, 23, became infected. His face swelled and a red, itchy rash covered his body. Doctors at the time diagnosed it as an allergy. Two months later, Mojica, 23, had the same symptoms. Medics administered shots of Benadryl to soothe the rash and inflammation. She didn’t give it much more thought

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Babies born to Zika-infected mothers are highly likely to have brain damage, even in the absence of obvious abnormalities like small heads, and the virus may go on replicating in their brains well after birth, according to three studies published Tuesday

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The Race for a Zika Vaccine

November 21, 2016

The Zika virus thrives in tropical climates. But it is also growing in this cold-weather city — up a flight of stairs, past a flier for lunchtime yoga and behind a locked door. That is where scientists working in a lab for Takeda, the Japanese drug company, inspect and test vials of the virus

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On Friday, almost a year to the day from that first warning, experts who advise the UN’s global health agency on Zika will grapple with the question of whether this most unusual of outbreaks still constitutes a crisis

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