Study suggests past COVID infection may not fend off omicron
THE HAGUE, Netherlands (AP) — South African scientists are warning that reinfections among people who've already battled COVID-19 appear to be more likely with the new omicron variant than with earlier coronavirus mutants. A research group has been tracking reinfections in South Africa and reported a jump with the arrival of omicron that they hadn't seen when two previous variants, including the extra-contagious delta variant, moved through the country. The findings, posted online Thursday, are preliminary and haven't yet undergone scientific review. Nor did the researchers say ...