According to a new study, the number of people who have tested positive for having antibodies to fight the novel coronavirus has dropped rapidly in recent months, tumbling 26 percent. The finding is significant because it puts into question the ability of populations to achieve herd immunity — a concept that relies on populations with antibodies increasing, not decreasing.
Per the BBC, 60 out of 1,000 people in the United Kingdom tested positive for COVID-19 antibodies at the end of June. But by September, only 44 out of 1,000 citizens were positive.
Wendy Barclay, who leads the infectious disease department at Imperial College in London, weighed in on the recent study of 365,000 individuals that showed a drop in immunity.
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