[Q&A] 4 types of vaccines to be secured ① Advantages and disadvantages ② When will the vaccination be given?

<Anchor> As

you can hear, the product we will be bringing is a COVID-19 vaccine made by AstraZeneca, Pfizer, Modena and Janssen.

Among these, I will get a vaccine from a company, so it seems difficult to choose this way.

Then, what are the advantages and disadvantages of the four types of vaccines, and when will they be suitable in Korea, this part will be explained in detail by medical reporter Cho Dong-chan.

<Reporter> The

effectiveness of the vaccine to determine how effective Pfizer is 95%, followed by Modena 94%, AstraZeneca 90% in the low-dose group, but an average of 70%, Janssen is scheduled to be released after January next year. is.

However, since the efficacy calculated in the clinical trial is one or two differences, the ranking may change after the actual large-scale vaccination.

How much will the vaccine work?

There are two main types of immune responses.

Neutralizing antibodies and immune cells.

The effect of neutralizing antibodies almost disappears after 3 months, but immune cells last for more than 6 months.

Pfizer and Modena vaccines mainly induce neutralizing antibody immunity, but AstraZeneca and Janssen vaccines use live viruses, so they induce neutralizing antibodies as well as cell-mediated immunity.

Expect the vaccine to last longer.

However, since it is a live virus, the risk of side effects is theoretically higher.

Unlike Pfizer and Modena vaccines, AstraZeneca and Janssen had a single clinical trial halted due to controversy over side effects, but they concluded that they were not related to the vaccine.

AstraZeneca and Janssen vaccines are likely to be available in Korea next year, but Pfizer and Moderna are not likely to be vaccinated next year.

(Video editing: Kim Jong-tae)