Hi, we were asked to take part in a study to test for Covid antibodies after we tested positive in PCR test. We did it - involved piercing our finger and collecting blood in a tube. We have now been sent the test again. Is this correct? If so, how many times are we going to be asked to do this? Test was actually more pleasant than the swab pcr test! But I don't want to do it again if it was sent to us in error. I cannot find any contact details so I can ring up to ask! Thanks x