Thread by @miamalan

[Thread] 1. How much more likely is an unvaccinated person to get infected with the #DeltaVariant vs a fully vaccinated person?

A new CDC report with US data found an unvaccinated person = 5x more likely to get infected than a fully vaccinated person.

bit.ly/3k3Q3le

2. Where does the CDC's data come from?

* It's real life data from between
- April 4 and June 19
- June 20 - July 17
* They looked at data from 13 US states
* Jabs that fully vaccinated people received = Pfizer/Moderna (92%), JnJ (8%)

3. What did the #DeltaVariant do to the protection #COVID vaccines offer @ infection?
It reduced vaccines' protection @ infection from 91% to 78%.

4. How do scientists know by how much the #DeltaVariant reduced the protection vaccines offered against infection?

They compared the risk of infection of 2 time periods:
April 4–June 19 (Delta = lower prevalence) and June 20–July 17 (Delta = higher prevalence)

5. How was the protection that full vaccination offers @ hospitalisation and death affected by the #DeltaVariant?

In short, not by much.

Hospitalisation: 94% to 91%
Death: 92% to 90%

6. How much more likely are people not vaccinated @ #COVID19 to end up in hospital or die of #COVID than fully vaccinated people if they're infected with the #DeltaVariant?
* End up in hospital: 10 times more likely
* Die: 10-11 times more likely
bit.ly/3k3Q3le

7. Conclusion: #SARSCoV2 infection, and hospitalisation and death as a result of it, is far more common among unvaccinated than vaccinated people. The reason? The effectiveness of vaccines.

8. Where was the CDC's data published? Morbidity and Mortality Weekly Report
When? 10 September
cdc.gov/mmwr/volumes/7…