PVS

The study was explicitly preliminary: Its sample size was only 42 people whose claims to have suffered long-term medical problems after vaccination were assumed to be accurate representations of their medical condition, defined by the researchers as “post vaccine syndrome,” or PVS.

Although critics have labeled REACT19 as an anti-vaccine organization, both say that’s untrue — it aims to support research into PVS.

Not all the PVS group suffered the same symptoms, raising questions about whether PVS can be accurately defined.

As it happens, the Yale researchers found that 26 of their PVS cohort, or about 62%, had antibodies in their system indicating that they had previously had COVID, but only 15 told the researchers that they had been infected at least once.

“But this is giving us some hope that there may be something that we can use for diagnosis and treatment of PVS down the road.... This is far from a final answer on PVS.”