https://www.siliconvalley.com/2021/01/26/8-myths-about-the-covid-19-vaccine/ > (CNN) — The United States crossed the terrible milestone of 400,000 deaths from coronavirus early last week, and there are currently over 2.1 million reported deaths worldwide, Johns Hopkins University data shows. > There are also new variants with mutations that could make Covid-19 even more transmissible and possibly even more deadly. However, there is also encouraging news, with two vaccines authorized for emergency use so far by the US Food and Drug Administration that are safe and very effective.