In a telegram sent to localities on September 15, Minister Nguyen Thanh Long said that the Delta variant has a short incubation period, high ability to spread pathogens and spreads quickly.

Clinically, doctor Nguyen Hong Ha, Vice President of the Vietnam Association of Infectious Diseases, said that when the Delta variant enters the body, it will cause the disease to progress faster than old strains.

Research published in the Lancet magazine on August 27, analyzing more than 40,000 nCoV positive cases in the UK, showed that the Delta variant causes more severe symptoms than other variants.

When they broke the data down by vaccination status, they confirmed Delta doubled the risk of hospitalization in people who had not been vaccinated or had received their first dose less than three weeks ago.

Regarding the speed of spread, in a July study, scientists confirmed: `Delta invades human cells more easily.`

Dr. Ha analyzed that with the Delta variant, the ability to take root in host cells of the respiratory mucosa is very easy.

It is currently impossible to calculate the exact amount of virus released into the air.

Experts estimate that Delta is about 50% more contagious than the Alpha variant.

The Delta variant has a rapid and wide spread rate.

Regarding the method of transmission, in addition to transmission through droplets and objects and surfaces contaminated with pathogens, nCoV can also be transmitted through the air.

Experts say that droplets smaller than 5 micrometers (called aerosols or aerosols) will hang in the air.

In environments with poor air circulation such as closed rooms, airplane cabins, cars, hospital rooms, halls, bars, karaoke… these small particles float in the air, with no escape.

According to studies, the Delta variant poses a higher risk of outdoor infection than the original variant, especially for unvaccinated people.

Experts emphasize that air ventilation is necessary and effective to prevent nCoV.

According to the medical community, vaccination is the best way to reduce the risk of virus infection.

Thuy Quynh