The Surge of Zika Virus
The mosquito-borne disease is spreading across the globe and has been linked to alarming birth defects and an autoimmune disease that can cause paralysis. Scientific American has been tracking the dengue-like illness since fall 2015
How Zika Spiraled Out of Control
The virus was a tiny, barely known annoyance. Scientists now think environmental changes made Zika explode into a global crisis
List of Possible Zika Birth Defects Grows Longer
Even without microcephaly, seizures and developmental delays may appear in the months following birth
The U.S. Takes Its First Shot at Zika
An NIH-backed vaccine is among several heading for human trials, but the timeline for large-scale deployment remains murky

Zika Virus Threatens U.S. from Abroad
Exclusive: An interactive map, based on data from 50 state health departments, details how the mosquito-borne disease made its way to America in travelers’ bloodstreams

New Report Says 279 U.S. Pregnant Women Have Zika
The new CDC numbers include pregnant women without symptoms, giving a more accurate picture

Zika Vaccine Could Solve One Problem While Stoking Another
Growing concerns about a Zika–autoimmune disease link are casting a shadow over vaccine development

CDC Declares Zika–Microcephaly Link Solid
The U.S. health agency says it is important for pregnant women to take safe sex precautions and avoid mosquito bites

What's Behind Brazil's Alarming Surge in Babies Born with Small Heads
Zika typically causes flulike aches and rash, but the rapidly spreading disease is fueling global worries about tiny-headed infants and brain damage

World Cup Fans Are Not Responsible for the Zika Explosion in Brazil
New genomic analysis clears 2014 sports enthusiasts of unwittingly transporting the virus

Sexual Transmission of Zika More Common Than Previously Believed
The more scientists learn about the mosquito-borne virus “the worse things seem to get”

First Case of U.S. Transmission in Ongoing Zika Outbreak Announced in Texas
Dallas County health officials say the patient acquired the virus via sexual contact

Why We Shouldn't Quarantine Travelers Because of Zika
Contrary to some Republican presidential candidates, public health experts say there should not be any travel or trade restrictions because of the virus

Evidence Grows Linking Zika, Microcephaly and Other Nerve Syndromes
Studies offer first hints about how the virus might damage the developing brain and fetus

Brazil Confirms Zika Infection from a Blood Transfusion
The country's government is asking donors to wait 30 days after infection to donate, but many patients are asymptomatic

WHO Declares Zika a Global Health Emergency
With the virus linked to serious birth defects, the designation should help fast-track international action and research priorities

U.S. Red Cross Asks Blood Donors to Wait 28 Days after Visiting Zika Areas
The decision comes even as the group says the risk of such disease transmission is "extremely" low

What Would It Take to Prove the Zika–Microcephaly Link
Public health officials are not yet ready to say the connection is causal

“Babymoon” Turns into Zika Nightmare
A Californian is the latest in a string of pregnant women potentially exposed to the tropical virus

WHO Extremely Alarmed by Zika, Cases Could Reach 4 Million
The organization will hold an emergency meeting on February 1 to discuss further response

Obama Calls for Rapid Zika Virus Research
As the mosquito-borne disease spreads top health and national security officials are discussing lack of studies, vaccine

Zika Disease: Another Reason to Hate Mosquitoes
Experts are concerned that the illness, which is increasingly linked to a disorder that causes paralysis, may become a problem in the U.S.

U.S. Warns Pregnant Women to Avoid Zika Virus
Centers for Disease Control issues travel warning due to birth defects linked to the rapidly spreading mosquito-borne disease

Zika Virus Cases Are Confirmed in the U.S.--What You Need to Know
A patient in Texas is the most recent of the 20-plus U.S. travelers who have acquired the disease outside the United States

El Salvador Urges Against Pregnancies Until 2018 as Zika Virus Spreads
More than 5,000 people have tested positive for the mosquito-borne illness in the country including suspected cases among 96 pregnant women