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Researchers in Houston have announced that they have developed the first hospital-based, rapid diagnostic test for Zika, an advance that they said should help public health officials identify if -- or, more likely, when -- infected mosquitoes reach the United States this summer. Using a sample of a patient's blood, urine, spinal fluid or amniotic fluid for pregnant women, the test can identify whether the DNA of the virus is present in as quickly as one day. Previously, physicians have had to ship blood or other samples to the Centers for Disease Control and Prevention and wait for a response. (Cha, 2/24)

Three pregnant women in Florida have tested positive for the Zika virus after returning from Zika-affected countries, the state health department announced on Wednesday. Citing privacy, the health department did not disclose the counties where the pregnant women live. (Miller, 2/24)