News & Perspective

Researchers say the findings could have serious health implications.

In other Zika developments, a human rights group raised concerns about water, sanitation, and other public health concerns in Brazil, and India announced microcephaly screening for newborns.

The study shows large releases are most effective in establishing and expanding mosquito populations.

The WHO says the cases in India likely reflect low-level transmission.

Officials note new H5N1 outbreaks in India, Laos, Niger, and Vietnam.