Public Health England study shows three-quarters of over 70s have COVID-19 antibodies

New findings show estimated 75.8% of 70 to 84 year old blood donors had antibodies against COVID-19 by early March. However, only 5.6% were from natural infection, which shows that older adults are able to mount a very robust immune response to a single dose of COVID-19 vaccine.

Source:

Public Health England