The same test is in use at a Houston-area blood center, with some others facilities in the southern United States planning to start testing.
The CDC notes 6 instances of Zika-linked birth defects, 3 involving live births.
All 4 babies with microcephaly were born to asymptomatic women.
Though the WHO has rejected calls to postpone or move the Olympics, the emergency committee reconsidered the issue again, weighing input from more experts.
The plan includes a tiered approach, tailored to how much Aedes mosquito and disease activity exists in any given region.
The WHO says it does not recommend delaying pregnancy in Zika-affected areas, while 3 reports highlight sexual transmission risks.
The CDC is working on a Zika response plan for when the first local US cases are detected.
Also, the NAS says more research is needed on genetically modified mosquitoes.
One report describes eye problems in a baby born without microcephaly and the other notes sexual transmission 44 days after the male partner's infection.
The World Health Organization (WHO) said today that its Zika emergency committee will meet for the third time on Jun 14, according to a notice e-mailed to journalists. It said experts will review the implementation and impact of the recommendations it made as part of their declaration of a Public Health Emergency of International Concern (PHEIC).
