In looking at the cases worldwide, I've noticed the USA and Germany infected numbers seem to be tracking at approximately the same rate as italy, france and spain and yet the mortality and critical ill percentages are far lower (like an order of magnitude. )
Any thoughts on this from anyone? Are we simply lagging in terms of our critical presentations?
It's odd, because france seemingly had it's infection rate track at approximately the same speed as the usa. We also have a far lower mortality or critical ill percentage than Italy did at a similar point a week or so ago when the infections were similar. Are we just getting infected faster?
Very important question.
Doesn't it seem like one day Italy had nothing, then the next day we hear about 8% CFR (case fatality rate)?
In reality the virus had been there for weeks, moving around and they didn't heed warnings for social distancing.
Another thing
I believe people think there is a "true" or canonical death rate from a virus. That is, they believe if you were to put this virus into a closed population of people with no medical care (like on a deserted island of 10,000 people) and wait 3 months, the virus would sweep through the island, people either survive or die, and you would get the canonical death rate. On this island people are allowed to social distance if they want. They can do anything they want in that system (except leave). But there are no hospitals or doctors.
A theoretical Closed System on an island
Total Population: 10,000
Introduce virus on Day 1, then wait 90 days
Number Infected: 4,600
Number Survived: 4,485
Number Dead: 115
Statistics in this closed system:
Infected Rate: 46%
CFR: 2.5%
One might ask, why don't all 10,000 people infected?
A: at some point people naturally move away from others, people develop immunity early on, and eventually herd immunity develops and the virus cannot spread anymore.
In reality though...there is no canonical CFR. We see different death rates in different populations due to a variety of things
- age
- population density
- comorbidities
- ability to manufacture a vaccine or develop treatment
- public health measures (wearing a mask, etc. social distancing)
- medical technology
Think what is happening in Italy. Doctors have had to ration medical supplies and decide who gets ventilators. That means they are allowing some people to die when they might had lived if they were put on a ventilator. This increases the death rate.
This is also why I believe the countries who got it early (China, Italy, Iran, Spain) will get hurt more than countries that get it late. Countries where there isn't mass spread yet can start to do social distancing very early on, containing the spread.
Just think we've heard almost nothing from India. A county of 1B people. Imagine it if spreads there? You think India's infrastructure can handle 30% infectivity rate with 1% CFR?
1,000,000,000 x 30% x 1% = 3,000,000 dead. Probably 10 million in hospitals all within a span of 6-12 months, maybe sooner.
The moment there are a few dozen cases in India, I would shut down the country if I were president. I would order mass shelter-in-place and quarantine for EVERYBODY. Especially since I doubt they will have quick access to tests. If this virus spreads in India their CFR might be 4-6%. Maybe their infectivity rate is higher than average because I think India is densely populated.
1,000,000,000 x 50% x 4% = 20,000,000 dead. Probably 50 million in hospitals all within a span of 6-12 months.
I think what's hard for people to understand, and it even took me some time to understand and I'm a freaking doctor...is the scale of how exponentially rapid these kind of novel viruses can spread. They can potentially blow up and infect 100s of millions of people in a matter of a few months. It also took me a long time to understand that despite having a relatively low COVID+ confirmation rate, it is falsely reassuring. There are AT LEAST 10x, perhaps 20x more cases out there. Perhaps even higher.
For the next century, all high school kids should take a mandatory course called "The Epidemiology of Coronavirus" and be forced to take it, and the class must spend 50% of the time talking about how to protect yourself when the next virus gets released into society.