Keith D Johnson on Nostr: 2/ "You can get COVID over & over. The idea that you become immune to COVID after ...
2/ "You can get COVID over & over. The idea that you become immune to COVID after getting infected or vaccinated is based on the concept of immune memory. Every time a pathogen enters your body (through infection or vaccination), your immune system mounts a defense to stop it: first a broad “kill anything that moves” phase we call innate immunity, then a phase of adaptive immunity, which is targeted to kill the specific thing that triggered the immune response. Pieces of the invader are used to create, recruit, & activate a variety of immune components — including antibodies, T cells, & B cells — that are trained to recognize that specific pathogen. Some immune system cells, called memory cells, are kept around from that 2nd stage as a sort of permanent record. If the exact same pathogen shows up again, the immune system already knows what to look for. This is the key behind vaccination: expose your immune system to a harmless piece of the virus, and it’ll remember it when it encounters the real thing."
Published at
2023-04-17 19:31:40Event JSON
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"content": "2/ \"You can get COVID over \u0026 over. The idea that you become immune to COVID after getting infected or vaccinated is based on the concept of immune memory. Every time a pathogen enters your body (through infection or vaccination), your immune system mounts a defense to stop it: first a broad “kill anything that moves” phase we call innate immunity, then a phase of adaptive immunity, which is targeted to kill the specific thing that triggered the immune response. Pieces of the invader are used to create, recruit, \u0026 activate a variety of immune components — including antibodies, T cells, \u0026 B cells — that are trained to recognize that specific pathogen. Some immune system cells, called memory cells, are kept around from that 2nd stage as a sort of permanent record. If the exact same pathogen shows up again, the immune system already knows what to look for. This is the key behind vaccination: expose your immune system to a harmless piece of the virus, and it’ll remember it when it encounters the real thing.\"",
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