Wondering what the coronavirus has to do with the tuberculosis vaccine you received in your childhood? Or maybe you think that vaccinating your child against a disease that is almost forgotten does not make sense? Scientists think they have found the answers to your questions! On this occasion, re-confirming that vaccinations make sense. And anti-vaccines - a problem.
Anti-vaccinators have just received a demo version of the world without vaccines. This is no joke - infectious diseases spread rapidly, and avoiding contact with the infected (i.e. sitting at home) is the only way to avoid them without developing herd immunity.
Scientists have traced the development of COVID-19 in different countries and already have some patterns. Interestingly, they propose that differences between countries in the impact of COVID-19 should be explained by different national policies regarding Bacillus Calmette-Guérin (BCG) childhood immunization, i.e. tuberculosis vaccination. To put it simply, vaccination against tuberculosis will help us if we catch the coronavirus.
BCG vaccination has been proven to provide broad protection against respiratory infections. It is no different in the case of falling ill with a new virus. Do you understand now how important vaccination is? What are the negative effects of avoiding them?
Countries without a universal BCG vaccination policy (Italy, Netherlands, USA) have been hit harder than countries with a widespread and long-term BCG policy. Countries that started common BCG policy late (Iran, 1984) have had high mortality rates, in line with the idea that the BCG protects the vaccinated older population.
Moreover, TB vaccination has also been shown to reduce the number of reported COVID-19 cases in the country. The combination of reduced morbidity and mortality makes BCG vaccination a potential new tool in the fight against COVID-19.
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Tuberculosis and COVID-19
Scientists wondered why in some countries, such as Italy, people die despite limited social contacts. For example, in Japan, which did not adopt restrictions on restrictions on social relationsthe mortality rate is very low. So an attempt was made to explain such differences.
The BCG vaccine comes to the rescue - it is a live attenuated strain derived from the Mycobacterium bovis isolate that is used extensively worldwide as a vaccine against tuberculosis (TB).
Tuberculosis vaccine is used in many countries, including China and Japan. However, in Spain, France, Switzerland, the Netherlands, the USA and Italy, it is not so common anymore, because these countries have stopped their common vaccination policy due to the relatively low risk of developing M. bovis infection.
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How does vaccination affect COVID-19?
Data collected suggests that BCG vaccination appears to significantly reduce COVID-19-related mortality. It also found that the sooner a country developed a BCG vaccination policy, the more severe it was to reduce deaths per million, which is in line with the idea that protecting the elderly population could be key to reducing mortality.
There is still no evidence, however, that vaccination with BCG in old age would increase defense in older people. This is confirmed by studies on guinea pigs administered the vaccine.
Correlation between the onset of universal BCG vaccination and protection against COVID-19 suggests that BCG may offer long-term protection against the current coronavirus strain.
However, randomized
is required to determine how rapidly an immune response that protects against COVID-19 is developingSee what the known contagious says about treating COVID-19:
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