# Coronavirus COVID-19 (2019-nCoV) Thread - 2021 Breaking News **URL:** \ **Category:** The Quarantine Zone\ **Tags:** covid-quarantine\ **Created:** [January 1, 2021, 8:03am UTC](https://boards.straightdope.com/t/coronavirus-covid-19-2019-ncov-thread-2021-breaking-news/929428 "2021-01-01T08:03:30Z")\ **Posts on this page:** 1\ **Showing post:** 1409
**Author:** ![Riemann](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/riemann/32/3133_2.png) [@Riemann](https://boards.straightdope.com/u/Riemann)\ **Post date:** [May 26, 2021, 8:16pm UTC](https://boards.straightdope.com/t/coronavirus-covid-19-2019-ncov-thread-2021-breaking-news/929428/1409 "2021-05-26T20:16:30Z")
> [@ThelmaLou](#): > > A weird mutation (as it were) among the anti-vaxxers world. In the ultimate irony, some of these fools are now advocating masking and social distancing - to protect them from vaccine cooties. Posted a couple of weeks ago in the Pit here: [Fucking maskholes and vaxholes - #674 by Riemann](https://boards.straightdope.com/t/fucking-maskholes/915339/674) > [@dtilque](#): > > However, there is the possibility of vaccines that contain a weakened form of the target virus to be a danger. That weakened form could mutate back into a virulent form. But then that would be virus rather than vaccine. So in antivaxxer reverso-world, that wouldn’t be a worry. > [@dtilque](#): > > However, none of the major COVID vaccines is a weakened virus-type. There is one out there that is, but I can’t remember its name. Sinovac is inactivated virus. They appear to nuke it until it’s pretty thoroughly dead. I’m not aware of any in widespread use that would be characterized as “live-attenuated”, where the risk of infection might be higher. > **[How the Sinovac Vaccine Works (Published 2022)](https://www.nytimes.com/interactive/2020/health/sinovac-covid-19-vaccine.html)** > > Using inactivated coronaviruses to train the immune system. This one appears to be in Phase 1 trials: > **[Meissa’s Nasal COVID-19 Vaccine Uses Codon Deoptimization for Stronger...](https://www.biospace.com/article/meissa-s-nasal-covid-19-vaccine-uses-codon-deoptimization-for-stronger-responses-/)** > > Meissa Vaccines’ intranasal live attenuated chimeric virus-based vaccine for SARS-CoV-2 (and its variants) recently was cleared for Phase I trials, which will start at the end of March. --- _[View the full topic](https://boards.straightdope.com/t/coronavirus-covid-19-2019-ncov-thread-2021-breaking-news/929428)._