Vaccines undergo extremely comprehensive studies before being widely approved for use, there's really not a lot to wonder about. For example, I think everyone

Vaccines undergo extremely comprehensive studies before being widely approved for use, there's really not a lot to wonder about. For example, I think everyone knows about the 2015-2016 Zika virus out-break and what experts believe to be a link to devastating child birth defects. This has clearly become a high priority vaccine candidate... and, we believe we already have one. It's just that, despite the devastating effects, medical professionals/scientists aren't going to go willy-nilly releasing it to the public without a comprehensive study (ideally multiple of them), for example, the following study which is expected to complete in 2019. https://www.nih.gov/news-events/news-releases/phase-2-zika-vaccine-trial-begins-us-central-south-america https://www.nih.gov/news-events/news-releases/phase-2-zika-v...