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Is the vaccine effective after the virus has mutated? Vaccination speed must outperform virus mutation
Is the vaccine effective after the virus has mutated? Vaccination speed must outperform virus mutation
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Wear a mask, wash your hands frequently, don’t get together, don’t gather... good habit of fighting the epidemic, please keep it
Wear a mask, wash your hands frequently, don’t get together, don’t gather... good habit of fighting the epidemic, please keep it
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