The big news of the day, of course, is that, following its emergency use authorization by the Food and Drug Administration, deliveries of Pfizer’s COVID-19 are beginning to stream from Pfizer’s warehouses to various pre-prepared destinations around the country. Those will soon be used to inoculated people according to the priorities in their individual jurisdictions. You can see the State of Illinois’s vaccination plan here. The top priorities are
- Healthcare workers
- Residents of long-term care facilities
- Essential frontline workers< including first responders
- Those with high risk medical conditions and adults over age 65
IMO there are aspects of those priorities that are misguided and even perverse. For example, residents of long-term can be protected by inoculating people who work in long-term care facilities before inoculating the residents themselves and they are, presumably, healthier than the residents.
Let’s divide the rest of the expectations into known knowns and known unknowns. I could color code these but I’m too lazy.
Known knowns
- The inoculations will be voluntary
- The initial inoculations will be limited in number. If the numbers given by Pfizer can be trusted, here in the U. S. we will have either hundreds of thousands or, possibly, a few million doses.
- Some people will be discouraged from getting the second inoculation by the side effects or the severity of their immune responses. That’s what happened during the clinical trials which is why I consider this a known known.
- Allocations will be partly practical and partly political. That’s simply the way things work when governments are involved which I why I consider this a known known.
- A black market in COVID-19 inoculations will arise. Whenever resources of anything are allocated a black market arises which is why I think this is a known known.
- There will also be some counterfeits. See above for why this is a known known.
- There will be some adverse reactions. Again, this is just the way things work.
- People who receive inoculations will start letting down their guards, engaging in behaviors they might not had they not been inoculated. Ditto.
Known unknowns
- We don’t know how many people in the U. S. will receive inoculations in this first round.
- We don’t know whether the Pfizer vaccine will prevent the inoculated from spreading the virus.
- We don’t know how many people who get inoculated will eschew a second dose.
- We don’t know how practical or how political the inoculations will be.
- We don’t know how many people will die simply from being inoculated. If we’re very, very lucky it will be zero but I’m skeptical. IMO prioritizing long-term care residents maximizes the likelihood of the number being non-zero.
- We don’t know what adverse reactions will be observed that weren’t seen in clinical trials.
- We don’t know how long the vaccine will promote people remaining asymptomatic or not spreading the disease (if it does, indeed, prevent people from spreading the disease)
- We don’t know whether the virus can or will adapt to the vaccine
- We don’t know whether the Pfizer vaccine has long-term adverse effects. That’s true for any new vaccine but IMO particularly true for this one because it employs a novel modality
- We don’t know how big the black market will be
- We don’t know how big the market for counterfeits will be
- We don’t known what the public reactions to the black market, counterfeits, or potential misallocations will be
- We don’t known how the general public will react to the adverse reactions or deaths
- We don’t know how how the media will react to the adverse reactions or deaths
- We don’t know when additional vaccines will receive emergency use authorization
- We don’t know when or if “herd immunity” can ever be reached
Please tell me what I’ve missed and I’ll add it to one of the lists. Also if any of my “known unknowns” are, in fact, known, please inform me an I’ll recategorize them.
It is possible that in the near term the inoculations will actually have the perverse effect of increasing the number of cases of COVID-19 diagnosed. We don’t know what the reaction to that will be, either.
Please don’t construe anything I’ve said in the post above as my attempting to discourage people from getting inoculated. That is not my intent. My intent is to try to control expectations.
Update
Bullet items which have been added to the lists have been added in blue.
How will the virus react to the vaccine?
https://www.nbcbayarea.com/news/local/race-for-a-vaccine/the-race-against-mutation-how-vaccines-will-keep-up-as-the-coronavirus-evolves/2420234/
That is a very good question. It ties in with another: can we ever develop “herd immunity”? We haven’t for seasonal flu, for example, and its rate of mutation suggests we never will. Or the common cold.
I don’t know how many of these will be significant like the black market (though in effect those MIT profs that inoculated themselves with home brew are an example, when will FDA kick down their doors and take them into quarantine for study?) or lack of a second dose. The latter depends on how effective a single dose is (might be strong enough that it might have been approved on its own) and how long it lasts, at least compared to two dose regime. Also whether switching vaccines for the second dose becomes a legitimate and attractive option.
We don’t know how many people will delay in preference for a different vaccine that they read about. I’m not sure if this matters, but if you read better things about Moderna than AZ, but your community is only distributing AZ, or you can’t find out which, will you wait?
How many vaccinations until the population perceives an impact? This would make a difference in both public acceptance (they see cases dropping) and a countervailing trend for increased socialization.
I believe it is known that reinfections are very rare, but unknown how long and how well past infections protect against future inspections. I think this is indirectly relevant to the success of the vaccine because at some point the combination of vaccines and infections are going to work together to suppress spread.
A good example although it’s also an example of distortion or even the politicization of the priorities. If the Pfizer vaccine proves wildly successful, does anybody doubt that there will be politically-connected people who are able to jump the queue? I expect some of that to start extremely early under the rubric of “essential workers”, if experience in Chicago is any gauge. Don’t the headlines about White House staff being inoculated early instantiate that point?
Things are happening fast, today some answers to the known unknowns.
“We don’t know whether the Pfizer vaccine will prevent the inoculated from spreading the virus.”
Pfizer has no data, but Moderna FDA submission includes data indicating it prevents transmission.
https://www.wsj.com/articles/modernas-covid-19-vaccine-is-next-in-line-for-authorization-11608028201
“We don’t know when additional vaccines will receive emergency use authorization”
Moderna will be given an EUA on Friday unless the world ends.
I haven’t got around to posting on it but Pfizer has acknowledged that it was blowing smoke (their phrase is “overestimated”) about the number of doses it was able to provide this month.
The US Government already exercised an option with Moderna for additional doses with defined timelines.
Given Moderna stores significantly better, my guess is more Americans will actually get the Moderna vaccine vs the Pfizer one.
If either or both of the companies’ vaccines prevent transmission, that would be very good news indeed.
I think that depends entirely on the each company’s ability to produce. I don’t expect anything other than self-serving claims from either company. Depending on the actual components of the two vaccines in the near to medium term it may be a zero-sum sort of thing, i.e. a maximum of n doses can be produced with n distributed between Moderna and Pfizer.