F0 in green area increases

Ho Chi Minh CityThe RT-PCR test for green, near green, and yellow zones in recent days recorded a positive rate of more than 7%, while the previous two tests had a positive rate of 0.8% for green, near blue, and yellow areas. 1.5%.

According to data from the Department of Health of Ho Chi Minh City, while the positive rate in green, near-green and yellow areas tends to increase, this rate in red and orange areas is decreasing.

On September 15, rapid antigen test of 344,649 people in orange and red areas was recorded, 3,912 people were positive, the rate was 1.1%. In the previous days, this rate reached about 1.3%, much lower than the last week of August. When Ho Chi Minh City deployed large-scale testing from August 23 to 29, the positive rate was in the orange and red areas. was 3.6% and in the second wave (August 30 to September 5) it decreased to 2.7%.

From April 27 to now, Ho Chi Minh City has taken about 1.95 million RT-PCR samples, of which more than 320,000 positive cases (most of the community) were detected, accounting for more than 16%.

The city-wide testing strategy was implemented at its peak from August 23 – when the distance was tightened. Accordingly, all people in the “orange and red zones” (high and very high risk) are tested quickly, people in the “green and yellow areas” (low risk) take 10 or 5 pooled samples for testing by RT-PCR method.

At a press conference on the afternoon of September 16, Deputy Director of the Ho Chi Minh City Department of Health Nguyen Hoai Nam explained that the number of infections increased, ranging from 4,000-6,000 per day, although the prolonged distance was due to the “rapid” strategy of testing. In which, many high-risk areas have tested up to 7-8 rounds, most “green areas” have tested 3-4 rounds.

According to experts, the reason for the high rate of blue zone positivity is due to The epidemic has entered the community for a long time, F0 is ubiquitous and area definition is not correct.

Doctor Luong Truong Son (former deputy director of the Institute of Malaria, Parasitology, and Entomology of Ho Chi Minh City), said that all districts have a lot of infections, F0 in the community everywhere – is one of the reasons why ” In the green zone, in the yellow zone, despite being tested many times, there are still infections, even increasing. So many areas are being called “blue zones” but are actually “outside blue, inside red”.

With the same opinion, Dr. Truong Huu Khanh (epidemiologist, consultant in the Department of Neurological Infections of Children’s Hospital 1) said that many areas were defined as “green” before testing for F0, so Now testing here has found many cases of infection. “This fact shows that people in green areas if they are subjective, free to live, and do not comply with the distance, they are very contagious and will become a red zone,” said Dr. Khanh.

Medical staff provide quick test instructions for people in the red zone in Binh Thanh district, August 23. Photo: Quynh Tran

About strategy vaccine coverage, reducing the treatment load Ho Chi Minh City is conducting, Dr. Khanh said that testing to separate F0 is still necessary while the city is still at a distance and has not been vaccinated enough for the risk group. Because if F0 is not separated in time, the epidemic will attack the risk group, thereby overloading the treatment block. “Only when more than 80% of the risk groups are vaccinated enough, the city can rest assured to reopen,” said Dr. Khanh.

Currently, about 970,000 people over 65 years old, people with underlying diseases are vaccinated, but there is no specific statistics on the percentage of this total group.

Recently, Ho Chi Minh City’s Covid-19 prevention and control work is considered to have achieved some positive results such as: strict social distancing, narrowing of the “red zone” rate, F0 getting access to medicine and support. timely medical assistance, vaccine coverage increasing rapidly day by day. On September 15, the city recorded 160 deaths, the lowest in nearly a month, since August 22 – before the city implemented increased distancing measures.

Le Phuong – Thuy An