Zika and Chikungunya Viruses Threaten Public Health

This month, the World Health Organization declared the Zika virus to be a public health emergency. Health officials suspect that Zika is linked to birth defects, including microcephaly, a condition that prevents a baby’s brain and skull from developing properly. Another virus that is spreading rapidly, Chikungunya, can cause chronic joint pain that lasts for months or even years. Zika and Chikungunya are both spread by mosquito bites. Currently, there is no vaccine for either virus.

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