It's from this study: https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)01253-8/fulltext https://www.thelancet.com/journals/lancet/article/PIIS

It's from this study: https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)01253-8/fulltext https://www.thelancet.com/journals/lancet/article/PIIS0140-6... Children are people under 18. > We considered parents and custodial grandparents as primary caregivers, and co-residing grandparents or older kin (aged 60–84 years) as secondary caregivers. Lot of kids are raised by their grandparents.