May 11, 2023

With the increasing global vaccination campaigns of intentional vaccines, people receive the first dose of the vaccine only, then within three to four weeks they return to receive the second dose, for the Pfizer and Moderna vaccines, but on the other hand, there is a single-dose vaccine from Johnson & Johnson, and this It means that for the other two vaccines, it is necessary for people who get the first dose to undergo again the second dose for full protection.

Does this mean that the person is protected after only the first dose?

People who have been partially vaccinated should commit to completing their vaccination series, said Dr. Paul Offit, director of the Vaccine Education Center at the Children’s Hospital of Philadelphia.

And the Centers for Disease Control and Prevention reported last week that the first doses of the Pfizer and Modern vaccines were 80% effective in preventing infection, and protection was measured two weeks after the first doses but before receiving the second dose.

Getting the second dose is really important for lasting protection, said Dr. Peter Hotez, co-director of the Center for Vaccine Development at Children’s Hospital.

After the second dose, protection against variants (mutated strains) begins, said the director of the Center for Vaccine Education at the Children’s Hospital of Philadelphia.

The second dose indicates that the immune system deserves a long-term response, said Michael Tal, an immunologist at Stanford University.

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