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effectiveness

Modern vaccine against covid-19 is 90 percent effective

Modern vaccine against covid-19 is 90 percent effective

Moderna and Pfizer vaccines are very effective against COVID in real conditions: CDC – El Financiero

Moderna and Pfizer vaccines are very effective against COVID in real conditions: CDC – El Financiero

The Novavax vaccine shows an effectiveness of 90%

The Novavax vaccine shows an effectiveness of 90%

Researchers are calling for the second dose of the Pfizer vaccine to be delayed

Researchers are calling for the second dose of the Pfizer vaccine to be delayed

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