5 sailors on the USS Theodore Roosevelt who tested positive for Covid-19, were quarantined, recovered, and returned to service, have tested positive for Covid-19:

Five sailors who returned to the aircraft carrier USS Theodore Roosevelt have tested positive for the novel coronavirus (COVID-19), said Navy spokesman Cmdr. Myers Vasquez.

The sailors had previously tested positive for the disease but they had spent more than two weeks in isolation, showed no symptoms for at least three days, and they all tested negative for the disease twice before being allowed back on the aircraft carrier, Vasquez said on Thursday.

“The five sailors developed influenza-like illness symptoms and executed their personal responsibility by reporting to medical for evaluation,” Vasquez said in a statement. “The sailors were immediately removed from the ship and placed back in isolation, their close contacts were mapped, and they are receiving the required medical care.”

Increasingly, there is evidence that, at best, any Covid-19 vaccine would be of VERY limited effectiveness, perhaps granting immunity for only a few weeks or a few months.

This is not good.