Some commentators and researchers have argued that high levels of intergenerational interaction (for instance, grandparents, parents, and children living together or in close proximity) are potential contributors to high infection and fatality rates since the start of the coronavirus pandemic. I have been sceptical whether intergenerational interactions are really that relevant. They might be of second order importance, but it seems to me that other factors such as back luck or delayed reactions to the pandemic might be more relevant.
It is surely important to analyze why some countries have higher infection and fatality rates than other countries. However, one should be very careful. There are many measurement issues. Premature conclusions are not warranted.
An interesting comment that discusses this issue and argues that intergenerational interaction might not be that important can be found here: