# Coronavirus COVID-19 (2019-nCoV) Thread - 2021 Breaking News

**URL:** https://boards.straightdope.com/t/coronavirus-covid-19-2019-ncov-thread-2021-breaking-news/929428
**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:** 1354

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### 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 13, 2021, 2:25am UTC](https://boards.straightdope.com/t/coronavirus-covid-19-2019-ncov-thread-2021-breaking-news/929428/1354 "2021-05-13T02:25:37Z")

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> [@Melbourne](#):
>
> Mr Morrison said there was not yet “considerable clinical evidence that tells us transmission is preventable” after the jab.

That’s _we don’t know yet_. So your post was another instance of the common misrepresentation that I noted in the other thread, in bold below.

> [@Continuing to keep masking for your own reasons](https://boards.straightdope.com/t/continuing-to-keep-masking-for-your-own-reasons/941850/20):
>
> This has consistently been very poorly reported in the press.
> 
> It is (obviously, when you think about it) much more difficult to study relative rates of transmission _from_ people who have been vaccinated, than to study whether vaccinated people are getting sick themselves. So _we don’t know_ to what extent vaccination reduces transmission, especially with new strains circulating. But it is certainly _likely_ that a vaccine that is so successful at preventing disease will also reduce transmission significantly.
> 
> **Careful scientists prudently saying _we don’t know if X is true_ is consistently poorly reported to imply that it means _we know X is false_ .**
> 
> So your conclusion is right - it’s prudent for vaccinated people to keep wearing a mask for the time being. But that’s not because we have any reason to believe than vaccination is ineffective at reducing transmission. We just don’t have firm data yet.

CDC:

[Science Brief: Background Rationale and Evidence for Public Health Recommendations for Fully Vaccinated People](https://www.cdc.gov/coronavirus/2019-ncov/science/science-briefs/fully-vaccinated-people.html#:~:text=These%20findings%20suggest%20that%20any,vaccinated%20with%20an%20effective%20vaccine).

> A growing body of evidence suggests that fully vaccinated people are less likely to have asymptomatic infection and potentially less likely to transmit SARS-CoV-2 to others. However, further investigation is ongoing.

The data we have are limited and mostly indirect at this point, but there are no data that I have seen to indicate the converse. It would be very much contrary to expectation that a vaccine that is highly effective at preventing disease would not also be effective at significantly reducing transmission.

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