Zika: Why Brazil, why now?

Several factors—including economics, climate and population—are all likely contributors, experts say.

Why being cold might foster a cold

Healthy body temperature boosts ability of immune system to fight the virus.

Patient Story

Lilly’s freedom

Lilly Vanden Bosch, 10, says good riddance to a nasty post-transplant virus.

Zika linked to autoimmune brain disorder

Researchers in Brazil detect symptoms similar to multiple sclerosis.

Vaccine for deadly respiratory virus shows promise

Researcher envisions routine immunizations within a decade.

Blood test could reveal your viral history

Can snapshot from the past be useful in the present?

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