@WHO: "1⃣ we don’t know enough about immunity to #COVID19. Most people who are infected with the virus develop an immune response within the first few weeks, but we don’t know how strong or lasting that immune response is, or how it differs for different people"-@DrTedros

@WHO: "1⃣ we don’t know enough about immunity to #COVID19. Most people who are infected with the virus develop an immune response within the first few weeks, but we don’t know how strong or lasting that immune response is, or how it differs for different people"-@DrTedros

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