This sterilizing immunity means someone who’s vaccinated will neither catch the virus nor transmit it further. Vaccine developers often hope that, in addition to preventing illness, their vaccines will achieve “ sterilizing immunity,” where the vaccination blocks the germ from even being able to get into the body at all. Similarly in California and Texas, only 0.05% of fully vaccinated health care workers tested positive for COVID-19. Within two months, among the 4.7 million fully vaccinated, the detectable infections fell by 30-fold. For example, in 6.5 million residents of Israel, aged 16 years and older, the Pfizer-BioNTech mRNA COVID-19 vaccine was found to be 95.3% effective after both shots. Researchers had hoped to design safe COVID-19 vaccines that would prevent at least half of the people vaccinated from getting COVID-19 symptoms.įortunately, the vaccines have vastly outperformed expectations. And no COVID-19 vaccines are yet authorised for the nearly 50 million children in the US younger than 12.Īs restrictions are lifted and people start to leave their masks at home, some people worry: Can you catch COVID-19 from someone who’s vaccinated?
Children aged 12 to 15 became eligible for the Pfizer-BioNTech vaccine only on May 10, 2021. Others with weakened immune systems, from cancer or medical treatments, may not be fully protected by their vaccinations. But some people cannot be vaccinated because of underlying conditions.
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