None of the participants with COVID-19 had 4 or more children; 0.08% of those without COVID-19 had 6 children; 0.05%, 7 children; 0.03%, 8 children; 0, 9 children; and 0.03%, 10 children. None of the participants with COVID-19 had 6 or more household members; 0.43% of those without COVID-19 had 8 household members; 0.27%, 9 household members; 0.03%, 10 household members; 0.03%, 11 household members; 0, 12 household members; and 0.03%, 13 household members.