Covid-19 vaccine injection is increasingly considered a potential solution when the NCOV virus is dangerous, threatening the war against the global pandemic.

I think there are potential benefits to mix vaccines, especially when the most effective vaccines are deficient, Ben Cowling, Professor of Hong Kong University of Community Health, told VnExpress.

The World Health Organization (WHO) on July 12 recommends that countries should not rush to mix vaccines, when research data on efficiency and health affects are limited.

The illustration of Vaccine Astrazeneca, Pfizer, Johnson & Johnson and Sputnik V are taken on May 2.

More and more countries consider injecting vaccines for the second dose or an enhanced nose to protect the people before the pandemic.

Thailand on July 12 also said the two Astrazeneca injections for those who were injected with a Sinovac, became the first public water injecting between Chinese vaccines and the Western vaccine developed.

Injections for vaccines are increasingly interested in recent published data shows the efficiency and high protection against NCOV's strains, Dr. Vinod RMT Balasubramaniam, molecular virological monks and senior lecturers at

Danish Institute of Danish Serum on August 2 indicates PFIZER or Moderna injection after the dose of an Astrazeneca creates a better protective layer for people in front of Covid-19.

A Korean study in July showed that the two pfizer injection after injecting an Astrazeneca increased 6 times the degree of neutral antibodies compared to two doses of Astrazeneca.

In other studies published by the direct investment fund of Russia (RDIF) on July 30, the Vaccine Sputnik V and Astrazeneca vaccination tests showed no serious side effects and did not record cases of infections among those

Combining two types of vaccines that can provide immune systems many ways to recognize pathogens, Dr. Balasubramaniam said.

Mr. Balasubramaniam is optimistic that vaccine injection can also help extend the immune time, because a picture is displayed in different angles that help immune cells remember better.

German Health Officials on August 2 said the country is expected to use Pfizer and Moderna to inject an enhanced dose for older people and have a poor immune system since September, regardless of whether the vaccine before

Vaccine injection can help increase flexibility for the vaccination program of countries and help many people protected more, according to Balasubramaniam.

More than 200 million people infected and more than 4 million people died from Covid-19 since the pandemic outbreaks from Wuhan City, China at the end of 2019. 4.36 billion doses of vaccines were injected globally, with average

Experts are concerned with a slow vaccination campaign in many countries due to a limited supply that can be used for viruses to continue spreading strongly and more dangerous mutations.

One car vaccination point in the capital Bucharest, Romania on April 29.

Vaccine is currently considered the key to help the world return to normal life.

However, the scientists warn that even the most effective vaccines are not perfect, when the number of sudden cases is reported recently, even if there is no risk of hospitalization and high deaths.

For countries who are aims to increase the vaccine coating, community health measures are still essential to prevent the virus from spreading and helps to have more time to promote vaccination, Professor Cowling said.

Despite the risk from Delta, the community health strategy has been used throughout the epidemic is still effective.