I’ve heard people say that achieving herd immunity to COVID-19 is the key… with that we can get back to normal. Protesters are saying without some risk, we cannot be free. I really wonder if they have any idea what they are talking about. I’ve done some analysis, to help illustrate the impact of achieving herd immunity. Personally, I believe the cost is too high and that we should extend and continue to apply social distancing (hate that phrase by the way… should be physical distancing, or simply stay away from me!) until there is a vaccine, or therapeutic treatment that would reduce the severity and death rate to something more like 0.1%, comparable to the flu.
Anyway… here is the math for herd immunity impact.
Starting point:
US Population = 330,000,000
Cases reported = 1,176,239 as of 5 May 2020
Deaths reported = 68,105 as of 5 May 2020 – 5.79% death rate
Assume death rate is over-stated due to inadequate testing by 3 times = 1.93% Death rate
Achieving 70% herd immunity point
Cases = 231,000,000
Deaths = 4,458,350 … this is 1.4% of the US Population
At this level, everyone will know someone that dies from this disease as most people know well over 100 people, so at 1.4 deaths per 100 people, you will know someone or two, or many more that will pass from this COVID-19 to achieve herd immunity
Now let’s also look at the cost of such devastation. If we assume just $2,500 per case for the cost of drugs, care, away from work (I think this is conservative) and we assume $150,000 is the cost of each death, for drugs, care, and impact to families (three weeks in a hospital must be much more than this)… then the cost of achieving herd immunity is more than $1.2T in direct costs, this is in addition to the rescue/stimulus funding that has been allocated and will be allocated in subsequent phases. Total cost to economy is likely to be $5 to 6T.
When someone talks about achieving herd immunity, you now have at least an idea of what they are implying in number of deaths, and potential costs.
It would be far less expensive and less deadly to give every man, woman, and child $10,000 for supplies and incentive to have them stay in absolute quarantine for 4 weeks to eradicate this virus (at least in the USA).
