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Mia Malan Profile picture
Mia Malan
@miamalan
Editor-in-chief @bhekisisa_MG. Subscribe to our newsletter: https://t.co/WHFq7od7w4 RTs ≠ endorsements

Jul 2, 2021, 5 tweets

[Thread] 1. Glenda Gray, @MRCza: How effective are different #COVID vaccines @ the Beta variant (B.1.351)?
* #JnJ: 64%
* Novavax: 48.6%
* AstraZeneca: 10%

2. Early lab data shows that the #JnJ vaccine works against both the Beta and Delta variants, but better against the #DeltaVariant.

3. Do we need to boost the #JnJ vaccine with a second shot (currently you only get one shot)? Not yet. Data shows that an immune response is maintained over time from a single shot for up to eight months after vaccination.

4. This slide shows how the #JnJ jab works @ the Beta + #DeltaVariants (Beta = B.1.351; Delta = B.1. 617.2). Why don't we have a final answer re if we need to boost the 1st #JnJ shot? We only have data for 8 mnths after vaccination. We don't know if immunity will wane after that.

5. Data from the #Sisonke study that will be released soon, shows real-word effectiveness of the #JnJ vaccine and that it works well against both the Beta and Delta variants in South Africa.

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