This article in Nature suggests the protection against infection falls to 13% after 3 months. And for AstraZeneca it wanes completely. https://www.nature.com/a

This article in Nature suggests the protection against infection falls to 13% after 3 months. And for AstraZeneca it wanes completely. https://www.nature.com/articles/d41586-021-02689-y https://www.nature.com/articles/d41586-021-02689-y