Those are increasingly the kinds of people who are dying of Covid-19, as the demographics of those hit hardest by the coronavirus have shifted since the pandemic first hit the United States. The country’s most recent, devastating Covid wave, fueled by the highly contagious delta variant, showed the strength of the virus even in the face of mounting vaccinations, with more than 100,000 deaths reported in the past three months.
A startling statistic emerged as advisers to the Food and Drug Administration debated use of the Pfizer-BioNTech Covid-19 vaccine in ages 5 to 11 last week. According to one federal scientist, by June an estimated 42 percent of these children had already been infected with the coronavirus.
That figure was much higher than anyone expected. But the estimate, from the Centers for Disease Control and Prevention, might have overstated the percentage of children who were infected, several experts said in interviews. Among other flaws, the percentage was based on tests known to have a high rate of “false positives” — signaling the presence of antibodies where there were none.
Vaccinated individuals with breakthrough infections with the Delta variant still have the risk of transmitting the virus even to their vaccinated family members, British researchers found.
The number of new Covid-19 cases in the United States has dropped by nearly a quarter in the last two weeks, further signaling a downward trend in the country’s fourth wave of the pandemic.
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