Effectiveness of second booster compared to first booster and protection conferred by previous SARS CoV-2 infection against symptomatic Omicron BA.2 and BA.4/5 in France https://www.medrxiv.org/content/10.1101/2023.01.11.23284137
Effectiveness of second booster compared to first booster and protection conferred by previous SARS CoV-2 infection against symptomatic Omicron BA.2 and BA.4/5 in France https://www.medrxiv.org/content/10.1101/2023.01.11.23284137