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Results from a Public Health England (PHE) study have shown that an over 75.8% of blood donors between the ages of 70 and 84 had antibodies against COVID-19 by early March, but only 5.6% were from natural infection. This indicates that older adults showed significant immune response after receiving one dose of COVID-19 vaccine. The proportion of over 70s with vaccine antibodies also started to increase beginning in January, which is what is expected since it takes 2 to 3 weeks to produce an antibody response after vaccination. Overall, 37.7% of the population had antibodies either from infection or vaccination, and those between 16 and 29 years of age make up the group with "the highest proportion of antibodies after natural infection, indicating ongoing infection and transmission in younger people."
Countering Misinformation & Disinformation: Practical Training for Organizations
Practical skills to detect, verify, and respond across an evolving information landscape
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