RT World Health Organization (WHO): All #COVID19 vaccines approved by WHO have been through clinical trials to test their quality, safety & efficacy…


RT World Health Organization (WHO)
All #COVID19 vaccines approved by WHO have been through clinical trials to test their quality, safety & efficacy. After approval, they are monitored for ongoing safety & effectiveness.
Here’s the difference between vaccine efficacy & vaccine effectiveness: https://bit.ly/3rq4Mtb

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