Top 5 earliest covid 19 vaccines in the world today

This vaccine was initially developed by a German company (BioNTech), then cooperated with the pharmaceutical company Fosun (China) and the company Pfizer (USA) to support clinical trials, transport and manufacturing. The clinical trial process began in April 4 with more than 2020 volunteers participating in three trial phases.

Preliminary analysis shows that the effectiveness of preventing infection can be up to 90% within 07 days after the second injection. This is the first vaccine to be approved for emergency and widespread use. In December 12, the UK was the first country to license this vaccine, followed by the US, the European Union and a number of other countries.

Some side effects have been reported of Pfizer-BioNTech COVID-19 vaccine include: injection site pain, fatigue, headache, muscle pain, chills, joint pain, fever, injection site swelling, redness, nausea, feeling unwell, swollen glands. Allergic reactions can also occur minutes to 1 hour after the injection.

According to the latest information from the Ministry of Health, it is possible that Vietnam will be provided with about 31 million doses of Pfizer-BioNTech COVID-19 vaccine in the third and fourth quarters of 3.

Currently, this vaccine is still in the experimental phase. However, it has reached the final stage with about 37.000 people from countries around the world participating in the trial. This vaccine holds promise as a potential candidate to immunize many people and is effective against both the South African variant of the virus, and possibly others.

Sanofi-GSK is an important part of the European Union’s vaccination campaign, highly trusted by the French President. The manufacturer is planning to produce about 1 billion doses annually, and it has signed supply agreements for the US, Canada and developing countries.

The vaccine is being approved for emergency use in the UK, based on a three-phase trial in the UK and other countries. Dozens of countries are using AstraZeneca vaccine, but the United States does not allow its emergency use.

Similar to the J&J vaccine, AstraZeneca has been confirmed by the US to have a post-injection coagulation phenomenon, specifically, their platelet count is reduced. However, this side effect is very rare, occurring in 222 cases reported out of 34 million vaccinated people across Europe and the UK, but only in a small number of cases fatal.

This vaccine only needs to be refrigerated and is less expensive than other vaccines. Currently, Vietnam is preparing to receive 30 million doses of AstraZeneca vaccine after urgently negotiating and working with many countries and manufacturers.

Johnson & Johnson Vaccine manufactured by Janssen Pharmaceuticals of & Johnson, is a viral vector vaccine. If you have had a severe allergic reaction (anaphylaxis) this J&J vaccine should not be given. In addition to the types of side effects like the Moderna vaccine, the US is suspecting J&J has potential signs of blood clots after the injection. There have also been rare cases of fainting (usually not serious).

J&J vaccine was 66,3% effective in clinical trials after 2 weeks of vaccination against previous infection (single injection). The vaccine is also highly effective in preventing a critical situation in people who are already sick.

Moderna vaccine Developed by the company in the US and is currently used by more than 45 countries around the world. In clinical trials, Moderna vaccine is up to 94% effective, helping to prevent covid-19 when given up to a second dose if there is no previous infection. People with pre-existing medical conditions are also highly effective after receiving this vaccine.

Side effects of Moderna vaccine are: Pain, redness, swelling at the injection site; fatigue, headache, muscle pain, chills, fever, nausea. This effect usually begins a day or two after vaccination. Currently, Vietnam is negotiating with the manufacturer of this vaccine to diversify vaccines to serve the people.