a significant trendP < 0.001
Cumulative incidence of people with severe COVID-19 showed a significant trend in decreasing proportion as the variant progressed (Cochran-Armitage test for trend, P < 0.001).
Cumulative incidence of people with severe COVID-19 showed a significant trend in decreasing proportion as the variant progressed (Cochran-Armitage test for trend, P < 0.001).