roubaixtuesday
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Other way round. They started with the single-dose approach and later commenced a double-dose approach. It's similar to the AstraZeneca offering, but (taken from CNN) made by taking "a small amount of genetic material that codes for a piece of the novel coronavirus and integrating it with a weakened version of adenovirus 26. J&J scientists altered this adenovirus so it can enter cells, but it doesn't replicate and make people sick. AstraZeneca uses a similar platform, but its adenovirus comes from a chimpanzee. The adenovirus carries the genetic material from the coronavirus into human cells, tricking them into making pieces of the coronavirus spike protein - the part it uses to attach to cells. The immune system then reacts against these pieces of the coronavirus. 'So you're not being infected with the virus that can give you Covid-19 when you get this vaccine. It just has some of the harmless Covid virus proteins on its surface,' ... 'So essentially it's a sheep in wolf's clothing, and when your immune system sees it, it responds to it and creates protection against it and in the future, against the real virus that causes Covid-19.' "
https://edition.cnn.com/2021/01/22/health/covid-19-vaccines-johnson-and-johnson-next/index.html
Yeah, that was my understanding too. So we don't yet know if single or double then?