of marginal significancep=0·060
Indirect protection was not significant for any age group, although it was of marginal significance for the group 16 years and older (33%; 95% CI −2 to 55, p=0·060).
Indirect protection was not significant for any age group, although it was of marginal significance for the group 16 years and older (33%; 95% CI −2 to 55, p=0·060).