Corona Virus

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Originally Posted by V8Ian

If herd immunity is a predetermined percentage of the population, unable to contact an illness, does it matter whether that inability has been aquired by vaccination or previous contraction?
My point is that if immunity (regardless of method aquired) only lasts 6~12 months, herd immunity will never be achieved.

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When people refer to “herd immunity” - usually about 70% of a population - they are usually referring to achieving it by vaccination, not infection.

If we achieved 70% vaccination in Australia for six months the virus would disappear because it wouldn’t have any hosts to spread in.

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Originally Posted by Arapiles

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If we achieved 70% vaccination in Australia for six months the virus would disappear because it wouldn’t have any hosts to spread in.

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Can't see that happening unless we totally isolate from the fest of the world. The practicality of no international air traffic or shipping simply won't work. We would run out of fuel in under a month, then the country will grind to a halt.

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Originally Posted by V8Ian

Can't see that happening unless we totally isolate from the fest of the world. The practicality of no international air traffic or shipping simply won't work. We would run out of fuel in under a month, then the country will grind to a halt.

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Yes, reinfection from OS would be an issue, but if everyone here is vaccinated it can’t spread widely.

Unfortunately we have 3 new cases - appears that someone from NSW came down for Christmas and visited lots of rellies. Great, thanks.

Does anyone know if the currently developed vaccines are all effective against the various strains?

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Originally Posted by V8Ian

Does anyone know if the currently developed vaccines are all effective against the various strains?

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bit too early to tell, however the article i read earlier today believe it would be effective as the strain isnt that different.

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Originally Posted by Arapiles

When people refer to “herd immunity” - usually about 70% of a population - they are usually referring to achieving it by vaccination, not infection.

If we achieved 70% vaccination in Australia for six months the virus would disappear because it wouldn’t have any hosts to spread in.

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70% won't cut it for this virus - like measles it needs a higher percentage because it is so infectious, probably 80-90%. Measles needs close to 95%, it all depends on the effective R0.

Attachment 167163

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Originally Posted by Arapiles

Unfortunately we have 3 new cases - appears that someone from NSW came down for Christmas and visited lots of rellies. Great, thanks.

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I was going to ask, 'Are people really that stupid?' and then realised that that would be stupid.

No COVID respite for NSW as 2020 comes to a close.

"The Croydon cluster is concerning because there's no established link," Premier Gladys Berejiklian said on Wednesday.


No COVID-19 respite in NSW as 2020 ends (msn.com)

3 new cases in Victoria, reportedly from NSW.


Coronavirus: Melbourne records new cases after two months virus-free (msn.com)


The question is, if Sydney had followed the Melbourne example, would they have contained it. ? A leading epidemiologist has said the decision to play the cricket at the SCG is based on emotion, not health advice. Is the NSW government trying to prove a political point , putting the health of their citizens at risk? All questions that must be asked.
Did the three positive infections in VIC. from NSW come from regional NSW? This is slowly turning into a fiasco.