The side effects of the Covid vaccine’s second dose are a feature, not a bug.

The Morning News https://ift.tt/3tjb7Xz

When hit with the second injection, the immune system recognizes the onslaught, and starts to take it even more seriously. The body’s encore act, uncomfortable though it might be, is evidence that the immune system is solidifying its defenses against the virus.

↩︎ The Atlantic

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