Only 60% of patients develop protective antibodies to COVID-19

A study performed in MedUni Vienna showed that just over half of patients develop protective antibodies after they are infected with COVID-19. And, it appears that these antibodies potentially make it easier to virus to infect cells.

This combined with previous studies showing that immunity wanes significantly after 3 months raise significant concerns about the effectiveness of any COVID-19 vaccine and long term human immunity to it.