They were then invited to the clinic for an antibody blood test at least two weeks after their infection had passed. These tests were conducted between April and June 2020.
Antibody test results were available for 266 participants. Of these, 176 tested positive for Covid-fighting antibodies (66 percent) while 90 (34 percent) tested negative.
Covid antibody levels wane over time, making someone infected with the virus eventually testing negative for the proteins.
The study findings showed 71 percent of those who reported a loss of taste or smell had Covid antibodies.