“As a pediatrician and parents, I fully support children being vaccinated, even if they become infected,” said Dr. Clark.
Cases of coronavirus are increasing again in the United States, especially in the Northeast, but so far the rise in hospitalizations has been minimal, and deaths are still falling.
Even among those hospitalized, CDC Director Dr. Rochelle Walinsky said, “We’re seeing less oxygen use, fewer ICU stays, and we haven’t, fortunately, seen any increase in associated deaths.” “We hope the positive trends will continue.”
CDC researchers began assessing people’s antibody levels at 10 sites early in the pandemic, and since then Expanded this effort For all 50 states, District of Columbia and Puerto Rico. Investigators use a test sensitive enough to identify previously infected people for at least one or two years after exposure.
Researchers analyzed blood samples collected from September 2021 to February 2022, looking for antibodies to the virus; They then analyzed the data by age, gender, and geographic location. The investigators specifically looked for a type of antibody that is produced after infection, but not just in vaccinated people.
Between September 2021 and December 2021, antibody prevalence in samples increased steadily by 1 to 2 percentage points every four weeks. But it jumped sharply after December, increasing by about 25 points by February 2022.
The percentage of samples containing antibodies increased to about 75 percent from about 45 percent among children ages 11 and younger and adolescents ages 12 to 17.
By February 2022, nearly 64 percent of adults age 18 to 49, about half of those ages 50 to 64, and about a third of older adults had been exposed to the virus, according to the study.