The CDC has expanded to 22 the number of countries and territories pregnant women should not visit due to the risk of contracting Zika virus, a mosquito-transmitted disease that may be causing microencephaly in infants born to infected mothers. Although initial concern has focused on Brazil, where 3,893 suspected cases of microcephaly have been reported with a major uptick since 2010, the World Health Organization said today that the virus will likely reach all of the Americas except Chile and Canada. Reuters (1/25), CNN (1/22)