‘Strain originating in India is 97% more communicable,’ says infectious disease expert

‘Strain originating in India is 97% more communicable,’ says infectious disease expert

Alexandre Naim Barbosa, head of infectology at Unesp and covid-19 advisor to the Brazilian Medical Association and the Brazilian Society of Infectology, said in an interview with CNN that the recent outbreaks of Covid-19 in India and Brazil are related to a large range of forms of meditation. Communicability.

“Delta was reported in this week’s WHO study” [Organização Mundial da Saúde], and it is 97% more transmissible than the original virus than the wild virus that caused the pandemic. gamma version [P.1, do Brasil], it’s 38% [mais transmissível]So you have an idea.”

Naime also spoke about the possibility of variants making the vaccines developed so far less effective.

“They can jeopardize the efficacy of the vaccine and the biggest example is the beta version from South Africa, which is particularly devastating the response to the Oxford/AstraZeneca vaccine. We have about 60, 70% of the response to the original virus – A good efficacy – but when this vaccine is challenged by a beta virus, this response drops to only 10%.”

However, he highlighted that the studies do not indicate a loss of effectiveness with respect to the variants circulating in Brazil. “Obviously for the gamma and delta variants, the vaccine bridge we’re using didn’t have a major effect, they respond well.”

different symptoms

A study by King’s College London suggests that the Indian-origin variant may cause symptoms different from those previously mapped in patients with the new coronavirus. According to research, this strain develops worse flu-like symptoms.

Infectologists say that “the virus tends to be more transmissible and less noticeable due to less specific symptoms.”

“Especially young people. They get more headaches, a stuffy nose or runny nose — what people call a runny nose — and a sore throat. They no longer have these types, which are more permeable, especially delta, they have more classic covid events, which are: cough, loss of smell, taste and poor general condition. “

Doctors analyze that this new condition presents an additional challenge to detect and isolate infected people.

“The virus stops giving more specific symptoms, which is very dangerous, because the person may think they just have a cold, that they just have the flu and become lethargic, don’t follow preventive measures, or even die. that don’t even take medical care. Tested and followed”.


Alexandre Naim analyzed that a person who contracted Covid-19 at the start of the pandemic in Brazil, the virus he calls “wild”, has a higher chance of contracting the first type of Sars Cov 2, the gamma variant , which is on the rise in circulation and incidents across the country.

“We have studies from Brazil that show that the likelihood of re-infection is higher when the person who had the first Covid-19 by the original virus comes in contact with the attention type, by the wild virus. we have data with gamma [brasileira] In which reinfection is 6 to 7% more common when a person who already has COVID-19 is exposed to the gamma variant”, he says.

(published by Cinara Pixoto)

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