The following is a summary of some recent studies on Covid-19. They include research that warrants further study to corroborate the findings and that has yet to be certified by peer review. Compared with the earlier Omicron BA.2 subvariant, currently dominant Omicron BA.5 is linked with higher odds of causing a second SARS-COV-2 infection regardless of vaccination status, a study.
Reinfections and severe outcomes may be more common with the BA.5 omicron variant compared to other coronavirus variants. Vaccines are also less effective against BA.5.