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Labour Leadership contest

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Who will be the next Labour Leader?
Lisa Nandy
0%
 0%  [ 0 ]
Sir Keir Starmer
80%
 80%  [ 4 ]
Rebecca Long Bailey
20%
 20%  [ 1 ]
Total Votes : 5

PDR
1345416.  Sun Apr 05, 2020 3:54 pm Reply with quote

Jenny wrote:
If, as seems quite possible, the Covid-19 virus is like the flu virus, it may well mutate every year as the flu does, so large stocks and repeat vaccinations will need to be given, as with flu. Certainly nobody wants to have a repeat of this lockdown.


Well maybe, but that's where the herd immunity comes in. The mutations may make a virus more or less virulent, but it's rare that it mutates so far that the immune system stops recognising it once it learned about the original. A few years ago we had SARS which was virulent for a while, but we acquired immunity and so now SARS (and what it has mutated into) so it's much ,ess of a problem. That's one aspect of it.

Another aspect is that in most cases viruses mutate into form that either don't cause illnesses or can't hijack the cell reproduction process, so they "burn out" by mutating into a non-functional or non-viable form. That's another aspect of it.

Finally there's the optional annual flu jab most of the 1st world get offered (free, if you're not in the land of the free and the home of the medical bill!). This isn't a single vaccine, but is a cocktail of vaccines for a range of virus types. Each year the medical experts in these countries look at what strains are around and which are likely to be a threat in the next "flu season". On the basis of that they select the required vaccines and order them into production so that the required cocktail can be administered in november/december. It's a guess, and it's not the same thing every year. In fact it's often not the same thing in different countries, because the medical authorities often have different views on what the likely range of flu viruses would be. So a general immunity boost to a broad spectrum of flu viruses is already an annual event for many, which also tends to prevent annual recurrences of the same virus.

So whilst it's by no means impossible it's not very likely.

PDR

 

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