Zika, Houston

Guardian UK: Houston's mosquito hunters take on Zika: 'We cannot spray our way out' - The health department that serves Houston is at the forefront of efforts to limit the spread of the mosquito-borne disease, and there’s no ‘silver bullet’

Now, Zika is believed to cause microcephaly, a severe birth defect that leaves children with abnormally small heads. In some people, it appears to cause the neurological muscle paralysis syndrome Guillain-Barré.

There are no vaccines to protect against the disease, no treatments for Zika after diagnosis, and few tools to fight the mosquito that carries it. Scientists were shocked to learn a mosquito-borne virus similar to West Nile virus could be transmitted sexually.