Scientists of UK Biobank conducted a study to determine levels of antibodies in recovered Covid patients. They tested over 20,000 participants for antibodies in England, Wales and Scotland for 6 months.
They found that high level of antibodies remain in the blood of 99% of the participants 3 months after being infected. They also found that high level of antibodies remain in the blood of 88% of the participants 6 months after being infected.
The scientists said that the results indicate that recovered patients have a 6-month immunity from the virus following an infection. They also said their results are consistent with other studies conducted.