On 29/01/2022 01:55, Anthony William Sloman wrote:
> On Saturday, January 29, 2022 at 11:11:50 AM UTC+11, John Larkin wrote:
>> On Sat, 29 Jan 2022 10:00:33 +1100, Sylvia Else <syl...@email.invalid>
>> wrote:
>>> On 26-Jan-22 4:28 pm, Rick C wrote:
>>>
>>>> So what could be a factor that results in a highly infectious strain
>>>> rising in rates so rapidly, only to peak and turn around in a short
>>>> time, well before a significant number of people are infected?
>>> It's puzzled me as well. The only idea I've come up with is that there
>>> is a very high rate of asymptomatic and undetected infections, such that
>>> the infection is really reaching a large proportion of the population.
>
> This neglects the point that people's behavior changes when they know that there is a high risk that they will get infected.
I don't think that is the driver until the death toll really starts to
climb as in Brazil or now in the USA - a pandemic of the unvaccinated.
Omicron is slightly less lethal than earlier strains but it is so much
more infectious that without vaccination the body count mounts up. The
new improved BA.2 strain appears to be even more infectious.
Interesting UK statistic is that 2 out of every 3 people infected by
Omicron had previously tested positive with another strain earlier in
the pandemic. It is still running at about Covid 1% infected here.
(It has been as high as 5% for nearly 4 weeks)
https://www.bbc.co.uk/news/health-60132096
Many of them are young party animals and in England the pubs and clubs
are all open and most are at least double vaccinated. The other category
is people who are occupationally exposed like medics and some customer
facing public service and/or essential front line workers.
In NI, Scotland and Wales such venues are closed and life has been much
more restricted since Boxing Day (eases this weekend). The really
strange thing is that it is impossible to see much difference between
the two strategies. It was worse in England but only by as much as you
would expect for it containing more very large cities.
There was no clear benefit from the lockdowns imposed elsewhere. That is
not at all what I expected to see.
>>> However, Western Australia seems to be managing to contain an outbreak, which doesn't fit with that.
>
> The West Australian government has made their population very nervous about getting infected - the changes in behavior may kick in earlier and harder there. Apparently hard enough to provide useful protection against even the Omicron strain.
It might work against them. The march of Omicron is pretty much
inevitable. It is far too infectious to contain outside of a
totalitarian state. The only question in the UK now is when do you catch
it rather than if you catch it. Several friends and neighbours have had
it in the past couple of months. My mate who had it in the initial salvo
March 2019 caught it again at a family Xmas lunch.
Basically it is a rerun of last winter but with very much higher peak
infection levels and case IFR down by more than an order of magnitude.
>
>> Containment creates a "reserve army of the uninfected."
>>
>> (Apologies to uncle Karl)
>
> John Larkin hasn't really got it into his head that you can vaccinate a population before they have been exposed to the infection. With the Omicron strain this doesn't stop them getting infected, but makes them less likely to get infected, and - on average shortens the course of those infections that do happen, and makes it less likely that the vaccinated infected will infect new victims while they are infected.
To be anything like effective against Omicron requires triple
vaccination preferably with AZ,AZ,Pfizer or AZ,AZ,Moderna. I know plenty
of people who caught Omicron whilst double vaccinated and one serious
case. Two doses offer almost no protection against catching it.
UK data suggests that there is very little difference between vaccinated
and unvaccinated in terms of onward transmission. The unvaccinated are
more likely to be at home and bed ridden whilst many vaccinated people
end up as barely symptomatic or asymptomatic carriers.
This shows up in the REACT study which tests a random 100k people every
week which shows a higher prevalence in the community of asymptomatic
cases that would be totally missed by the test on symptoms regime.
So according to ANU there is nothing to worry about! "Herd" immunity has
been reached. I think you will find that is not the case in practice!
>
> "There are currently 103 active confirmed cases in WA.
>
> Of these, 42 are in hotel quarantine and 61 are in self-quarantine.
Lock 'em up! Though in the case of dodgy vaccine denying tennis star I
think they should have never let him into the country in the first
place. Looks like he faked his Covid tests according to BBC researchers:
https://www.bbc.co.uk/news/59999541
It is easy when you have 100 live cases but much harder when you have
100k new cases or more every day (as is the case in the UK).
>
> These six new cases bring the State’s total number of COVID-19 cases to 1260, with 1148 people having recovered from the virus.
>
> The update also revealed there had been a surge in first vaccinations in WA in the last 24 hours."
>
> I can't find a number for the total deaths, but 1260-1149 -103 suggest that it s nine, or about 3.4 per million, which is remarkably good.
It will only stay that way by keeping the place tightly locked down.
I am a bit surprised that Australians will stand for it.
After triple vaccination the optimum strategy for anyone who is
reasonably fit may well be to catch Covid whilst the immune response
from the vaccine is at maximum effectiveness. That combination of
vaccinated and surviving a Covid infection might just provide enough
long term immunity to make it an endemic disease we can live with.
The vaccine works well to prevent serious illness but the way Omicron is
propagating in the UK's highly vaccinated population suggests that the
only way out of this is to vaccinate and then let it run right through
the nominally protected population. Too bad for those immunosuppressed
individuals for whom the vaccine doesn't work.
The antivaxxers and refuseniks can take their chances. They were
picketing in Newcastle yesterday claiming "Covid Hoax". They fully
deserve what they get if it kills them. Stupid is as stupid does.
--
Regards,
Martin Brown