One advantage of all the testing is the samples are all stored, and easily revisited, so can be tested quickly against the new strain(s).It would be great if that were the case given we were originally working on the basis of 3 month immunity. A lot of it depends on the reliability of the testing and how much exposure there has been.
If be interested to see them all retested with the spread of the new variant and see if the results are the same.
Obviously given the experience with my dad I am still very sceptical about false negatives on the pcr testing. (I've also had the reason behind this explained to me by the medical team but I'll do a post about that another time)
Good news about your dad being on the mend Paddy.