While it swept five waves, the last of which was particularly contagious, why do some still escape disease? Here are some of the answers
Some lucky people ask themselves the question: After five waves, when the virus has spread everywhere around them for two years, when everyone around them ends up – twice – and when the chances of contracting are multiple, why have they never contracted Covid-19? This question is even more vital since with the dazzling omicron variant that has infected more than 300,000 people in France daily for several weeks, it is currently difficult to avoid the transition from a contact state to a contaminated state.
So, except in the case of hermits who have not met anyone for two years, or those without children or the nod of wall fanatics, how did the others escape? Several factors appear to appear.
Not all blood types seem to have the same ability to fight the virus. Group O will be relatively spared from infection and severe forms of the disease, according to a study by Inserm (National Institute for Health and Medical Research). Conversely, a Canadian study showed that groups A and AB were “at greater risk of staying in intensive care for a prolonged period or resorting to mechanical ventilation”.
According to the scientific journal Epidemics, the risk of transmission will be higher among people with the same rhesus. Inserm says that other immune factors could also be involved, without it being possible today to accurately identify them all.
Super immunity, or luck
Another explanation may be genetics. Some benefit from a kind of “super immunity” to Covid: the same physiological inequality which means that, outside of a pandemic, some never get sick, and some often.
In the same category are those who have had it and developed asymptomatic and undetectable forms of the disease. But it clearly can pass it on to people whose symptoms will be more severe. Hence the reminder in each study of the need to respect health protocols, which are admittedly very restrictive.
Benefits of the common cold
The good old colds are also coronaviruses. According to an English study, the body can remember that it fought them and will successfully apply the same defense against Sars-Cov-2. This will be especially the case in children, especially those who are prone to runny nose and are highly resistant to Covid-19, despite severe infection.
The path that scientific laboratories such as Moderna are currently studying is to develop new, more effective, “universal” vaccines against coronaviruses.
Scientists are finally warning against placebos to protect against the disease spreading on the Internet. According to a page on the WHO website that lists misconceptions about the virus, minerals and vitamins, despite all the benefits they provide, are useless against Covid-19. Hydroxychloroquine preventative as well. Much less alcohol…