In-Depth: Early data shows COVID-19 vaccine safe for pregnant women CDC releases numbers on side effects, birth results As more people get the COVID-19 vaccine, new data is coming out on it's effect on pregnant women. ABC 10News Reporter Jared Aarons takes an In-Depth look at the early numbers, and why researchers say the results are promising. and last updated 2021-05-19 10:13:42-04 SAN DIEGO (KGTV) - Early numbers released by the CDC and other researchers show the COVID-19 vaccine is safe and effective for pregnant women. As of May 17, 114,668 women have registered with the program to log their symptoms.