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In Nature’s writings, reviewed by Infostart, the researchers cite five reasons why we really should forget about herd immunity: Lo, they’re online!
The decrease in spread is uncertain.
With regard to flock immunity, it would be crucial that even if someone does contract the disease, there must be few around them to whom they can transmit it. Vaccination with Pfizer and Moderna is very effective in preventing symptomatic diseases, but we cannot yet be sure of this level of protection when transmitting infection.
Uneven vaccine distribution
In theory, a worldwide coordinated vaccination campaign would have provided the opportunity to eradicate the virus from the face of the Earth, but currently there are great inequalities in the vaccination of the population in each country. In most countries, immunizations have been initiated in the elderly, but much remains to be done to vaccinate children, and clinical trials have only just begun in their circles. However, vaccination also varies greatly geographically: there are more vaccinated areas in the world, but since no country or continent exists as an island, the virus can re-enter the other countries from unvaccinated areas at any time.
Variations make the situation difficult
Variants are also challenging, including those that cause reinfection or may simply elude the protection provided by vaccination. When many people are immune in an area, the spread of variants that can cause reinfection comes to the fore.
Immunity doesn’t last forever either
We do not yet know how long naturally acquired protection lasts, or how long the vaccine provides protection. The experience with coronaviruses points in the direction in which the protection provided by the infection will pass over time, and we don’t even know exactly how long the vaccines will protect them.
Vaccination changes human behavior
Although vaccination does not provide 100 percent protection, the behavior of those who have already been vaccinated will certainly be less cautious than that of those who have not yet been immunized. It is a question of how well vaccinated people will be persuaded not to return almost immediately to the way they lived before the pandemic, and restrictions will play an important role in stopping the spread of infection, even with vaccination. .
Cover image: Getty Images
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