Vaccination guarantees protection against COVID-19?

2021-08-13 07:32 PM

In the fact that 53 medical staffs who have been given 2 full doses of COVID-19 vaccine have tested positive for SARS-CoV-2, questions around COVID-19 vaccination have been raised again.

Vaccine protection is not absolute

Analyzing this issue, Dr. Pham Quang Thai, Head of the Northern Immunization Office, Deputy Head of the Department of Infectious Disease Control, National Institute of Hygiene and Epidemiology, said that vaccines do not provide immediate protection. It takes at least 14 days after the first injection to take effect, and the level of protection after the first injection is only very low. After 1 month or more of the second dose, the vaccine will have optimal protection and this effectiveness is only about 60%-90% depending on the type of vaccine.

This expert emphasized the COVID-19 vaccine does not provide absolute protection, especially the ability to protect the body from carrying the disease. This means that once we are vaccinated, we may not get COVID-19, but there is still the possibility of becoming a carrier of the virus and infecting others.

However, when warning of this risk, Dr. Thai also presented the results of specific research on COVID-19 infections at the Central Hospital for Tropical Diseases or in Dien Bien before, there were also cases positive for SARS-CoV-2 after being vaccinated. ask for COVID-19. The results show that the possibility of secondary infection from these people is almost nonexistent, the virus transmission rate is very low.

5K+ vaccines to prevent COVID-19

Although the effectiveness of the vaccine is not 100%, according to experts, this is still an effective weapon to help prevent COVID-19 and move towards creating immunity for the community.

Also according to Dr. Thai, early research in Vietnam shows that people who have recovered from COVID-19 have extremely low rates of immunity. That's because the SARS-CoV-2 virus has proteins that interfere with the production of antibodies, so even if you are infected, the body will make antibodies or not is uncertain. Meanwhile, a recent study at the Central Institute of Hygiene and Epidemiology showed that the situation was very positive for those who received the vaccine: Just one month after the first injection, 90% of the people who were vaccinated had developed antibodies. This result indicates that the vaccine is effective, although it may not be strong enough - This is why we need a second dose to be most effective.

Faced with the question many people ask: Even a person who has received 2 doses of the vaccine and is still positive for SARS-CoV-2, what is the real benefit of the vaccine? Head of the Northern Vaccination Office affirmed: “It is to protect the vaccinated person from falling into a serious condition and having to be hospitalized. Up to this point, the vaccine used in Vietnam has been proven in the field when there have not been any cases of serious illness or death with two full doses. The case of medical staff who have received 2 full doses of the vaccine but tested positive for SARS-CoV-2 belonging to the Hospital for Tropical Diseases in Ho Chi Minh City is an example: 52/53 complete cases. no symptoms at all. However, this also warns that it is not possible to be subjective after receiving the COVID-19 vaccine.

Despite being vaccinated, vaccinated people still need to strictly follow other preventive measures, especially implementing 5K measures to protect themselves, their families, colleagues, and the community.
"Let's implement 5K + Vaccine measures together to prevent COVID-19 epidemic" - Dr. Pham Quang Thai emphasized.

-Source: Vietnam Ministry of Health-