A question have been asking myself: When infections hit multiple family members (e.g. as a result of home quarantine of mild cases) what are the chances of orphaning any children?
(thread)
For any infected person (incl. undiagnosed/mild), the probability of this doubly tragic outcome is:
Cohort IFR x cohort IFR x (probability of transmission)
some guesses using IFR for older folks
a) 0.5% x 0.5% x 60% = 15 per million
b) 1% x 1% x 80% = 80 per million
For a clinically confirmed case, the formula changes to:
Your CFR x partner's IFR x (probability of transmission before isolation)
a) 2% x 0.5% x 40% = 40 per million
b) 2.5% x 1% x 50% = 125 per million
Plug in your own guesstimated figures
My low end 15 per million is about 1/8 of the annual risk of being a motor vehicle fatality (1 in 8,303) iii.org/fact-statistic…
Personally, this estimated risk level is worth bearing some costs to avoid. Really don't want to orphan my kids.
There are 18 million cohabiting couples in the US. Assuming that (say) 2/3 have dependent children, then 'herd immunity' without a COVID treatment is going to lead to hundreds to low thousands of orphaned Americans. pewresearch.org/fact-tank/2017…
That estimate is via the home infection channel alone. I haven't computed the cases where both partners are infected independently of each other.
To reduce home infection, implement CENTRALIZED QUARANTINE