Let's summarize the contents so far with medical reporter Cho Dong-chan.

Q. What are the frequency of cardiac complications after Pfizer vaccination?

[Cho Dong-chan / Medical reporter (specialist): That's called myocarditis and pericarditis.

There are no Korean statistics, so let's look at the US statistics.

In the first dose of Pfizer vaccine, there were 2.6 cases per million people.

At the time of the second dose, there were 8 cases per 1 million people.

There were more in the second.

There were more people aged 16 and over, and there were relatively more men than women.

It usually occurs within a week, but it occurs up to the 21st, so you have to be careful.

If you experience chest pain, shortness of breath, or a feeling of pounding as your heart beats rapidly after being injected, you should go to the hospital immediately.

The sooner you receive treatment, the better.]

Q. What is the countermeasure against infection in those who have completed vaccination?

[Cho Dong-chan/medical reporter (specialist): Israel, which has a high vaccination rate, recently exceeded 1,000 confirmed cases a day. On some days, the vaccine completion rate was over 40%. As of last week, there were 252 cases in Korea. It's also due to the delta mutation. This is also due to the fact that the neutralizing antibodies made by the vaccine decrease over time. Cross-vaccination is being discussed as a countermeasure. mRNA vaccines such as Pfizer and Moderna have the advantage of producing a lot of neutralizing antibodies in a short time. This is because vaccines using viruses such as AstraZeneca and Janssen have the advantage of being effective for a long time. According to a paper published last week in the Journal of the American Academy of Internal Medicine, cross-vaccination produced much more neutralizing antibodies. In a study published in Nature, it was confirmed that the vaccine used against the virus made the immune system last longer. In Korea, cross-vaccination is being performed due to the supply and demand situation of vaccines, but we need to consider it strategically.]

Q. What is the reservation status for vaccinations in their 50s?

[Cho Dong-chan / Medical reporter (specialist): We are doing it in real time now, and at 8 o'clock, there was a waiting list of 120,000 people, but now it has decreased to several thousand people, but it can still take about 30 to 40 minutes. . However, this time, as time passes, you can do it leisurely, and it is possible for 24 or 6 days, so I think you can make a reservation with a relaxed mind.]

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