While the number of vaccinations for the novel coronavirus infection (Corona 19) increased to 380,000 people on the 9th, 6 confirmed cases of corona after vaccination. As it takes time to form immunity after vaccination, the number of such cases may increase in the future, the authorities said.
According to the Korea Centers for Disease Control and Prevention on the 9th, 6 cases were counted as positive for corona after vaccination by the 8th. Three people, including two nurses working in the corona treatment ward at the National Medical Center, were identified as medical staff, and the specific identities of the remaining three were unknown.
On the morning of the 27th of last month, medical staff at the National Medical Center’s Central Vaccination Center in Euljiro, Jung-gu, Seoul, are receiving the Pfizer vaccine. Photo co-recruitment group
The authorities said it was not unusual, citing the possibility that they could have been infected before or after vaccination. They may have been infected with the virus before getting the vaccine and developed symptoms after the incubation period passed, or they may have been infected by exposure to an infectious agent before the formation of antibodies after vaccination.
At a briefing on the 8th, Jung Eun-kyung, head of the Central Defense Countermeasures Headquarters (Disease Administration), said at a briefing on the 8th, “I know there will be more. There is a possibility that it has already been infected,” he said. Park Young-joon, head of the epidemiological investigation team, Dae-bon Bang, explained, “There is a half and half possibility of infection before and after vaccination two weeks after vaccination.
When such news is known, the Internet responds with a reaction such as “Is it necessary to be vaccinated and infected?” “Vaccine is like an infectious agent”.
However, the authorities explain that it has nothing to do with vaccines. Team leader Park Young-joon explained that “there is little effect of vaccination on the diagnosis,” and “it has nothing to do with it at all”. The U.S. Centers for Disease Control and Prevention (CDC) also said, “The corona vaccine licensed in the United States does not contain an active virus that causes corona. It means that the corona vaccine cannot make you suffer from corona.”
On the morning of the 21st of last month, a vehicle is entering the Central Vaccination Center in the National Medical Center in Jung-gu, Seoul. yunhap news
Experts explain that the possibility of infection after inoculation is sufficient as it takes time to produce antibodies. Vaccine clinical trials show that it takes about 10 to 14 days for antibodies to be produced. Experts say that even after this period, a second vaccination is necessary in order for the vaccination targets to be protected.
Jeong Jae-hoon, a professor of preventive medicine at Gachon University Medical School, explained, “The vaccine shows a good effect even with a single vaccination, but it takes time to show the effect.” In the case of Pfizer, it is known that 52% of the preventive effects have been achieved 14 days after the first vaccination.
However, Professor Jeong said, “According to British data, adults aged 19 to 64 who received a single vaccination tend to increase their risk of hospitalization up to 2 weeks after vaccination.” Since the week, even this is not perfect. “The full performance of the vaccine is not seen until 1-2 weeks after the two doses.”
CDC also explains, “It usually takes several weeks for the human body to build up immunity after vaccination, which means that you can get corona infection before or after vaccination.”
Such cases have often been reported abroad. In Israel, 22 medical staff who first received the Pfizer vaccine at a large general hospital were infected with the corona. Cases of infection after the second vaccination have also been reported. According to CNN reports in the United States earlier last month, Democratic Congressman Stephen Lynch was infected with Corona 19 after completing the second vaccination.
This is the reason for re-emphasizing compliance with quarantine regulations, such as wearing a mask, regardless of vaccination. Professor Jeong Jae-hoon said, “You should not be relieved just by vaccination. Vaccines do not prevent 100% infection,” he said. “After vaccination, social distancing and wearing masks should be kept.”
According to the current vaccination guidelines, those who have a confirmed history are not eligible for vaccination. However, the authorities are in the position that they will review the data in the future and guide the standards for the second vaccination again. As the CDC says that vaccination is possible after a cure, the vaccination review committee will discuss it again later.
Reporter Hwang Soo-yeon [email protected]
