Only took two years. Watch them walk it back.
Not likely to walk back there is now plenty of quantified serological testing to prove that antibodies from a 90 day or recent infection have a high enough titer level to prevent reinfection with the same variant. Outside 90 days the levels in the majority of people drop below the critical threshold for infection. This is why the time limit of 90 days. People who have had covid and gotten the vaccines have 100 to 1000 times the antibodies titers of those who just recovered from infection again there are dozens of peer reviewed data sets to back those numbers up with tens of thousands in the N values of those studies. The Lancet has at least half a dozen up for review for those with the reading comprehension skills to understand what the science is showing.