Twitter17 Jul 2020 10:52
https://twitter.com/bigbitenow/status/1284040532944203777?s=21
I'm certainly in the long term Covid testing camp.
People playing the vaccine eradicates testing card, are for me misunderstanding the ability and chances of a vaccine, delivering sufficient efficacy, to protect a population.
A successful vaccine must achieve c. 70% herd immunity in the total population.
The chances are that a significant portion of the population will refuse the vaccine.
Therefore, the vaccine has to be better than 70% efficacy to achieve its original goal in total population
Approx 10% of all vaccines that enter clinical trials, are eventually licensed. That does not mean they then go on to meet the herd immunity target.
The Oxford trial currently being promoted as the lead candidate
has to have one heck of a run to beat that 1 in 10 percentage. Even then its got to beat all flu vaccine performances, seen over the last decade (best being 60% efficacy), to meet the target.
Anything short of that and we are looking at ongoing testing on a long term basis if they indeed achieve their goal and I truly do wish them well with it, then we still have the problem of vulnerable people (generally over 70s, low immune systems), requiring added measures (tests) because their immune systems generally don't accept vaccines that well.
That aside, and assuming the very first vaccine candidate does indeed hit its 70% herd immunity requirement and the whole world population is keen to take it, it still has to be produced and distributed.
A logistical nightmare.
Plus what is advertised in the UK, isn't the reality in the rest of the world.
The Oxford team talk up Sept (which is dangerous) but the lead scientist of their S.A. trial, is talking best case vaccine results by end of November.
That's not regulatory approved, distributed and herd immunity achieved.
I'll park my thoughts on the lower middle income countries that will likely never see a vaccine or will be years down the line.
However, long term testing that is easy to use and deploy is going to have a place in this world, so long as Covid has the ability to inflict such strong affects on our health.
Treatments will no doubt reduce world concerns but in order to treat, we must first of all test.
Best/cheapest tests should do well for a long time to come.
One other important point.
If said vaccine is indeed deployed, whatever its efficacy, given the limited analysis conducted on it to date, it would be a reckless government, that did not continuously test in order to monitor its effectiveness.
The lower the front end efficacy, the more testing will have to be employed, until such time the vaccine's effectiveness is properly established.
The idea that a rapidly produced vaccine would immediately become the sole front line protective measure, is for me just absurd.