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In both patients, the second infection caused more severe symptoms than the first, according to Richard Tillett (University of Nevada, USA) and the Institute of Microbiology of the University of Quito.
The case from the US state of Nevada is that of a 25-year-old boy with symptoms of a cold and diarrhea who tested positive for SARS-Cov-2 in mid-April. At the end of May he returned to seek medical assistance with symptoms such as fever, headache and cough, and at times he had to be ventilated. Genetic testing has shown that the first and second infections were due to different variants of SARS-CoV-2, according to the researchers.
The two infections in the Ecuadorian were also due to different variants of the virus, according to the Quito institute. The disease took a mild course in the patient in May and showed moderate symptoms in August.
WHO assumes individual cases
More recently, researchers from Hong Kong, Belgium, and the Netherlands reported documented cases of new infections (read more here). The World Health Organization (WHO) assumes that there are now around 25 million registered corona infections worldwide and that these are individual cases.
It is not yet clear how long immunity lasts after the first SARS-CoV-2 infection and how its duration is related to the severity of the disease. Until now, researchers have assumed that a corona infection that has passed will at least temporarily provide protection against a new infection.
Rapid rise in India
There have already been more than 25 million SARS-CoV-2 infections worldwide. Currently, the coronavirus is spreading faster and faster, especially in India. On Sunday, the New Delhi Ministry of Health reported 78,761 new infections were detected; no other country has registered so many cases in a single day.
In the country with the second largest population in the world, around 3.54 million cases of infection have so far been confirmed. The number of deaths in India increased in one day by 948 to 63,498. This means that India, along with the US and Latin America, is increasingly becoming the focus of the coronavirus pandemic.
In Maharashtra alone, the richest and most urban Indian state, 331 virus-related deaths were recorded in one day. Despite the spread of the disease among a total of 1.3 billion Indians, Prime Minister Narendra Modi is pushing for a return to normalcy to alleviate the economic damage caused by restrictions on public life. The government has decided to put the metro back into operation in the capital, New Delhi, where around 20 million people live. Starting September 7, the trains will run for the first time since March, but with some restrictions. Cinemas, swimming pools and amusement parks, among other things, must remain closed.
Despite the falling numbers, the situation is in the U.S still serious. On July 16, the United States recorded the most new infections in just one day with 77,299 new infections. At least 44,635 new infections were reported there within one day on Saturday. This means that a total of about 5.98 million people in the US have been shown to have contracted the corona virus. The number of deaths increased by at least 906 to 182,772.
In Brazil The Ministry of Health reported 41,350 new infections detected in 24 hours, a total of more than 3.84 million people were infected. The number of deaths increased by 758 to 120,262. Although the numbers are increasing rapidly, they have gradually stabilized in recent weeks.
More than 25 million people around the world have been shown to have contracted the coronavirus since the first cases were known in Wuhan, China, in December. More than 840,000 people died related to the virus. According to experts, the number of unreported cases is likely to be significantly higher. Latin America is the region with the most infections in the world. In addition to Brazil, Peru, Colombia and Mexico are particularly affected.
