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People vaccinated against COVID-19 can also contract the coronavirus, although this is rare. The vaccine is also intended to prevent the severe course of the disease, the risk of hospitalization and death. In this aspect, vaccinations show over 90% effectiveness. Remember – the more vaccinated people, the higher the vaccination effectiveness.
- No vaccine can protect 19% of COVID-100 infection. However, it significantly reduces the risk of disease
- Vaccines are even more effective in protecting against a severe course of infection, the necessity of hospitalization and the risk of death
- This is confirmed by another research recently published by American specialists
- More current information can be found on the Onet homepage.
COVID-19 after vaccination? It is possible
This is nothing new – specialists remind that there is no vaccine that would have 100 percent. effectiveness. However, each vaccine, to be allowed for use, must meet the appropriate requirements: it must have a good safety profile, be well tolerated by the recipients, must be immunogenic, i.e. induce an assumed immune system response, and must meet the requirement of effectiveness.
– All approved COVID-19 vaccines (including AstraZeneka) offer a very high degree of protection against the more severe course of COVID-19. Clinical studies show that they have almost 100 percent. effectiveness in the prevention of hospitalization, if the inoculated person becomes infected with coronavirus – emphasizes Dr. Piotr Rzymski, an expert in the field of medical biology and research at the Medical University of Karol Marcinkowski in Poznań.
«In large randomized, double-blind clinical trials (such methodology guarantees the highest quality of the study and the most reliable results), each vaccine has been shown to be safe and effective in preventing symptomatic and laboratory-confirmed COVID-19. Despite the high level of vaccine effectiveness, a small percentage of fully vaccinated people will develop asymptomatic or symptomatic SARS-CoV-2 infection, according to a paper published by the CDC, the US Centers for Disease Prevention and Control.
Some observations show that on average, cases of illness after vaccination against COVID-19 occur in less than 5% of respondents. people. Among them there are, although extremely rarely, also fatal cases.
The analysis of infections after full vaccination in the period from January 1 to April 30, 2021 was recently performed by scientists from the CDC, who are monitoring the situation on an ongoing basis.
How many fully vaccinated people got COVID-19?
By that date, roughly 101 million people in the United States had been fully vaccinated against COVID-19.
«Until April 30, 46 states had registered a total of 10 cases of SARS-CoV-262 infection in this group (fully vaccinated). Among them, 6 (446%) occurred in women, and the median age of the patient was 63 years. It was initially determined that 58 (2%) infections after full vaccination were asymptomatic, 725 (27%) patients were hospitalized, and 995 patients (10%) died. Of 160 hospitalized patients, 2 (995%) either had an infection asymptomatically or was hospitalized for reasons unrelated to COVID-289. The median age of the patients who died was 29 years. 19 (82%) of the deceased showed no symptoms of infection or died of causes unrelated to COVID-28 ″, the report reads.
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At the same time, they emphasize that in one week of April 24-30, 355 were registered in the general population in the United States. COVID-19 cases.
The summary of data on infections in the population vaccinated over the course of four full months (4 10 cases) and infections in the entire population from just one week at the end of April this year (626 thousand) shows that it is worth getting vaccinated, because the risk of catching coronavirus by the vaccinated person is really low.
The authors point out that the number of infections could have been higher than that recorded in the systems collecting data on infections. It is known from other studies that the level of viral load is significantly lower in vaccinated people who will nevertheless become infected. They are therefore often asymptomatic and less contagious than unvaccinated people (so they may not be aware of the infection and may not come for a test).
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Other studies have also shown that infection after vaccination is rare.
The results of one of them appeared in March this year in the journal “Morbidity and Mortality Weekly Report”. The study looked at the effectiveness of mRNA vaccines against COVID-19 among U.S. healthcare workers, emergency services and teachers, and therefore those who come into contact with many people and are particularly at risk of being infected with the coronavirus. The observation covered a total of almost 4 people from eight states, of which 75 percent. of these had at least one dose of vaccine. The overwhelming majority of these were mRNA vaccines (almost 63% of those vaccinated were with the Pfizer vaccine, and almost 30% – with Moderna).
Importantly, all study participants were routinely tested weekly with genetic tests and, additionally, when there were any symptoms of SARS-CoV-2 infection, so it was impossible not to detect the infection, even if it was asymptomatic.
Out of almost 4 people, during the three-month observation, SARS-CoV-2 infection was confirmed in only 205. Among partially vaccinated subjects, i.e. those who had received only one dose of vaccine throughout the study or prior to the second dose, only eight SARS-CoV-2 infections were confirmed. Neither of them were heavy.
Post-vaccination infection – who is most at risk?
– Vaccinations are practically 100 percent. protected against recurrence of a severe form of the disease – confirms prof. Ernest Kuchar, infectious disease specialist, head of the Pediatrics Clinic with the Observation Department of the Medical University of Warsaw.
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According to specialists, it is possible to predict who may be in this group and take special care of these people. These are mainly patients:
- with reduced immunity and a less efficient immune system, incl. people in advanced age (the CDC analysis indicates that people of advanced age, and therefore often immunocompromised, have the highest risk of developing severe COVID-19),
- people taking immunosuppressive drugs, e.g. in rheumatological, oncological or transplant ailments.
«COVID-19 vaccines are a key tool in overcoming this pandemic. The conclusions from the extended timeframe of this study add to the evidence that COVID-19 mRNA vaccines are effective and should prevent most infections. Fully vaccinated people who contract COVID-19 are likely to have a milder, shorter disease and are less likely to transmit the virus to other people. These benefits are another important reason for vaccination, ”said CDC director Rochelle P. Walensky.
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Other research findings suggest that fully or partially vaccinated people who contract COVID-19 may be less susceptible to transmitting the virus to other people.
Therefore, due to the severe course of COVID-19, hospitals today mainly include people who have not been vaccinated with any vaccine against the disease. Each vaccine available on the EU market significantly reduces the risk of severe COVID-19 disease.
The CDC also notes that the more people get vaccinated, the more vaccine will be effective. Vaccinations hinder transmission of the virus, and the less it circulates around us, the fewer infections, both symptomatic and fully developed.
Do you want to test your COVID-19 immunity after vaccination? Have you been infected and want to check your antibody levels? See the COVID-19 immunity test package, which you will perform at Diagnostics network points.
Interesting conclusions also come from the United Kingdom, where 83,7 percent. adult residents are vaccinated with at least one dose, and 61,2 percent. – fully. On June 27, the highest number of infections since February 5 was registered – over 18.
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The death rate, although the number of deaths has increased slightly recently, is not high. In the UK, there are currently between several and twenty deaths a day due to COVID-19. The number of hospitalizations due to COVID-19 also remains relatively stable, at a relatively low level. This is a completely different situation than in the fall of last year, when hundreds of British people were dying from COVID-19 every day.
Monika Wysocka, Justyna Wojteczek, Zdrowie.pap.pl.
Read also:
- You will now take your second dose at any point. How to do it?
- “The biggest Delta epidemic in a well-vaccinated country”
- What do convalescents need to know before going to vaccination?
- Top 15 questions about the second dose of the vaccine
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