Is it true that vaccines become useless, because the bacteria they are directed against constantly mutate and it is impossible to adapt to them?

Is it true that vaccines become useless, because the bacteria they are directed against constantly mutate and it is impossible to adapt to them?

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answers (2)

Answer 1
June, 2021

No, that's not true. Vaccines are quite effective.

First, all infections included in the vaccination schedule are well controlled if the schedule is followed. For Russia, as far as I remember, these are tuberculosis (in infants), hepatitis B, poliomyelitis, diphtheria, tetanus, whooping cough (in young children), measles, rubella, mumps.

It seems that they were introduced into our rotavirus vaccine calendar (rotatec), but it's too early to tell about the results. In the calendars of other countries there are effective vaccines against hepatitis A, chickenpox, cervical cancer (Gardasil), Haemophilus influenzae.

Secondly, the variability of viruses and bacteria or leads to the fact that against such variable pathogens it is impossible to create a vaccine (hepatitis C, HIV), or - that the vaccine was created not against the pathogen itself, but against its toxin (diphtheria, whooping cough).

Vaccination against influenza is worthwhile. Influenza is a severe, but currently quite rare disease (somewhere around 5% of all acute respiratory infections). Indeed, the influenza virus changes from year to year, thanks to the worldwide surveillance system it is possible to predict this in time (vaccines change every year). Therefore, seasonal influenza vaccines are generally effective (against influenza). Another question is that these vaccines do not protect against all other acute respiratory infections at all. In any case, it is a proven fact that vaccination of vulnerable groups (for example, elderly, immunodeficient) reduces mortality from complications of influenza.

Answer 2
June, 2021

Partly true. But, I note that even the bacillus Calmette and Guerin, known as BCG, is even more effective. And this is the second created vaccine (the first - against smallpox), it is more than 100 years old!

But the flu virus mutates quickly, and there are just a lot of strains, so you cannot be vaccinated for life - maximum for a year with a "fresh" vaccine.

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