According to media reports, in Brazil, two patients who were tested for coronavirus showed an unexpected result – they were infected with two strains of SARS-CoV-2 at once. Such data were presented according to the findings of the National Laboratory of Computer Science (a division of the Brazilian Ministry of Science). Moreover, one of the strains is a new variant previously discovered in South Africa, and the patients themselves suffered the disease in a mild and asymptomatic form. The researchers suggested that the infection occurred almost one after the other with a short interval of time. Therefore, they once again emphasized the importance of using personal protective equipment.
AiF.ru found out from therapist, immunologist Irina Yartseva, whether such a situation could really have happened and whether two strains can simultaneously complicate the course of the disease.
– You need to understand how it all works. Here we have a nose, with our nose we breathe in all the air that is around. Nobody knows what is in this air. There can be anything, in any quantity. That which flies and is alive begins to somehow try to penetrate into the body, but collides with our cellular immunity, which tries to destroy the pathogen as much as possible even at the level of the nasal mucosa. The nasal mucosa constantly fights with external factors so that no one penetrates further. Therefore, when we take an analysis from the nose and sow different material there, this does not mean that a person is seriously ill and this virus has penetrated deep into the body.
Two strains can go deeper, it happens. Of course, the body usually has enough strength to suppress most of the pathogens. He may miss some without recognizing a specific type of cell. That is, the body did not recognize that the pathogen was foreign, and accidentally missed it, it happens.
But there is also a concept – cross immunity. If a person is confronted with a coronavirus, he forms immunity. Even if there is a molecule similar to this disease, he will neutralize it. This is dangerous in the case when patients are weakened, in whom the immune system is completely weakened – for patients after chemotherapy, with AIDS and others.