Why is influenza vaccine considered useless and dangerous? Measles and rubella are also caused by viruses, do they not mutate? What is the difference?

Why is influenza vaccine considered useless and dangerous? Measles and rubella are also caused by viruses, do they not mutate? What is the difference?

Virology Lectures 2018 #19: Vaccines

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answers (2)

Answer 1
January, 2021

All organisms mutate, you mutate, elephants, whales, cockroaches, mosquitoes, etc. Moreover, all viruses mutate - and in comparison with all others, they mutate at a terrible rate. If the mutation of mammals is often fixed for tens of thousands of years, the mutation of insects - for hundreds and thousands of years, the mutation of viruses, on average, is fixed within a few and tens of years.

But even among viruses there are slow-mutating and fast-mutating. Influenza is perhaps one of the fastest-mutating viruses pathogenic for humans, sometimes a couple of new strains appear during the year.

Now about the uselessness and danger. She is considered dangerous only by idiots who do not believe in medicine or conspiracy theorists who are frostbitten. There are really dangerous vaccinations that, in certain circumstances, are received only by narrow groups of the population who are highly likely to become infected - these include vaccinations against plague, tick-borne encephalitis, yellow fever and some more. But even among the most common vaccinations, the flu shot is one of the safest. Complications occur in about 1 case per million.

As for the uselessness - the situation here is more complicated. Firstly, even if you were vaccinated against the flu of a certain strain, but the full-fledged immunity did not have time to form, then if you catch this strain within 2-3 weeks after the vaccination, you will be fully ill, as if you were not vaccinated. Secondly, even if the immune system has formed, then you can still pick up this strain - though you will almost certainly get sick in a mild form. Thirdly, there are dozens of strains of influenza, and the vaccine contains 3 or 4 strains, no more. These strains are “guessing” by WHO, some scientific associations and vaccine manufacturers. They predict which of the strains will be the most common in a given season. But in addition to the most common, less common will probably circulate and then the vaccination will not help much. The most unpleasant situation is if they suddenly do not guess or a new strain appears - then the vaccination will not really bring much benefit

Answer 2
January, 2021

Why is influenza vaccine considered useless and dangerous?

Who is it? She has two risks, the first is not to guess with the strain and then there simply will be no effect, the second is complications, but they come from all vaccinations and drugs. There is nothing super dangerous in the flu shot.

Measles and rubella are also caused by viruses, do they not mutate? What's the difference?

The difference in mutation rate. Measles, rubella, smallpox and the like mutate once every half a century so that the vaccination has partially lost its strength. The flu mutates about 100 times a year. 1-2 strains remain, but the rate of mutations is enormous.

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