My apologies for the length of the post, read it if you want, there's no obligation to read it.
As there's been much speculation in the media, and this forum, about whether large multi-generational families spread a highly contagious infection quicker, easier, more effective than smaller single generational families, I thought I'd explore it a little.
This discussion has nothing to do with any other discussion and is purely hypothetical and academic.
For this hypothetical exploration, let's take two entirely different cultures,ones that don't exist, but it's just to explore the processes. Let's assume that we have identical size of population in both scenarios.
Let's take one that predominantly (as it's hypothetical I'd accept solely) consists of large multi-generational households, and another that is predominantly (again for this hypothetical scenario, I'd accept, solely) consists of single person households.
In the event of a full scale pandemic, and subsequent lockdown, which of the two hypothetical scenarios would be a) more likely to spread the infection, and b) easier for government agencies to control, track and trace?
In the hypothetical scenario of the large multi-generational households, and during lockdown, one member of the family will process all the shopping, and in the event of that person becoming infected, a) only their immediate family will be mostly affected, and b) tracking and tracing their contacts would be simple, fast and effective. It's simply the rest of the family who will be required to isolate.
In the hypothetical scenario of the single person households, all of the people would be required to process the shopping for essential items, etc, unless they can rely on family members and friends. Therefore almost the entire population will be mixing with everyone else. If any of them become infected, tracking and tracing their contacts would be quite an onerous task. It would take time, resources and people, (people who may also be required to work, travel, etc.)
Then there is another issue that perhaps ought to be considered: during such a lockdown, which type of household is likely to suffer any psychological effects?
So, given these two hypothetical scenarios, large multi-generation families are least likely to exacerbate the spread of highly infectious diseases.
Due to the presence of the other family members, large multi-generational families are least likely to suffer psychological problems.
Of course those two hypothetical scenarios don't exist. All cultures consist of a full range of all sorts of households. Also there are other aspects that would interfere with the theory, such as essential work, travel, school, etc.
But I would suggest that large multi-generational families are not, if that is the only aspect to be considered, more likely to speed or extend the spread of highly infectious viruses. Quite the reverse, that type of household is more likely to restrict the speed and spread of contagious diseases and more likely to effect a better degree of control of the virus.
The very fact that the household consists of multiple generations most likely means that the majority of them may never need to go out at all. Therefore the population intermingling is essentially reduced significantly.