Appendix 2—table 1. Group sizes to achieve at least ~ 80% power for constant experimental ${\displaystyle R}$.

Effect size (Total Vaccine Efficacy)	Experimental reproductive ratio R	Group size	Power
75%	2.0	52	82%
75%	1.5	52	80%
50%	2.0	128	82%
50%	1.5	128	80%
25%	2.0	600	82%
25%	1.5	600	80%