Executive Director of the world health organization emergency health Mike Ryan said at a briefing on 11 may that the concept of so-called “herd” (collective) immunity in combating coronavirus is a threat. Video briefing posted on the who channel on YouTube.
Herd immunity is an epidemiological term that is commonly used to describe the condition of populations in which a large percentage of the population becomes immune to infections (due to vaccination or diseases) and thereby extends protection to the rest of the population. With measles, for example, to achieve herd immunity when vaccinated 95% of the population reported by the who.
Ryan said that there are opinions, supposedly countries may not enter the quarantine “do nothing”, and then “suddenly, magically achieve “herd immunity”.
“And what if along the way we lose a certain amount of older people? It really is a dangerous calculation,” – says the representative of the who.
Judge urged to use caution coming from veterinary epidemiology the term “herd immunity” because it “can lead to a very brutal arithmetic that does not put people life and suffering to the center.”
Technical lead of the who programme on emergency health Maria van Kerkhove, who also participated in the briefing, said it is unclear what percentage of the world’s population has antibodies to the coronavirus. Some countries have carried out serological tests (antibody tests), but who have been unable to “critically evaluate” research. Preliminary data show that a very small number of people tested (from 1% to 10% in different countries), have the antibodies, it means that many “remain susceptible” to the virus, said the expert.
“The concept of “herd immunity” is generally used when we talk about vaccination. What do you think the population must have immunity to protect the rest of the population? We don’t know exactly what should be this percentage for [coronavirus infection] COVID-19. But he should definitely be higher than the one we see in serological studies,” she said.
Flash coronavirus infection COVID-19 began in late 2019 in China. March 11, 2020, the who announced the spread of the coronavirus pandemic. According to data from the American Johns Hopkins University, the total number of infected people in the world exceeded the 4.23 million people, including more than 288 thousand died of 1.47 million recovered (the population of the planet exceeds 7.7 billion).
The who noted that at the moment there is no convincing evidencethat patients who recover from COVID-19, stable developed immunity to re-infection by the coronavirus SARS-CoV-2.
Special medications from coronavirus infection does not exist now in this disease is only symptomatic treatment. According to who, the world is now being drafted at least 70 of vaccines against coronavirus.