Vaccinated people get COVID-19 more often: scientists still don't know the reasons - ForumDaily
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Vaccinated people get sick with COVID-19 more often: scientists still do not know the reasons

While it is clear that vaccinations continue to provide powerful protection against COVID-19, there is growing concern that vaccinated people may be more vulnerable to serious illness than previously thought. The edition told in more detail Bloomberg.

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There is a paucity of scientific research with concrete answers, and politicians and corporate leaders have to formulate plans based on scattered information. While some renew the mandate to use masks or postpone opening offices, others cite a lack of clarity to justify adhering to this course. All of this may seem like a mess.

«Мы должны смиренно относиться к тому, что мы знаем и чего не знаем», — сказал Том Фриден, бывший директор Центров по контролю и профилактике заболеваний (CDC) и глава некоммерческой организации Resolve to Save Lives.

In the absence of clear public health messages, vaccinated people do not understand how to protect themselves. How vulnerable they are is a key variable not only for public health officials trying to figure out, for example, when revaccinations might be needed, but also for deciding whether to postpone re-discovery amid a new wave of the virus. On a smaller scale, the obscurity has left music lovers unsure of whether to attend concerts and has sparked new criticism from parents pondering what the school will look like this year.

Instead of replies, many case studies have emerged that give a slightly different picture of breakthrough infections. The data from surveys for the presence of the delta variant and the number of vaccinated people conducted at different times are very different, which makes it difficult to compare the results and find out patterns. It's hard to say which data might end up carrying more weight.

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«Совершенно очевидно, что сейчас у нас больше данных, чем было в начале, — сказала Моника Ганди, эксперт по инфекционным заболеваниям из Калифорнийского университета в Сан-Франциско. — Все мы знаем кого-то, у кого он был. Но у нас нет точных клинических данных».

One of the most famous outbreaks among vaccinated people occurred in the small coastal town of Provincetown, Massachusetts, when thousands of vaccinated and unvaccinated people gathered on dance floors and house parties on the 469th of July weekend to celebrate US Independence Day. About three quarters of the XNUMX infections were among vaccinated people.

The authors of the CDC case study said this could mean they can transmit COVID-19 in the same way as the unvaccinated. However, they warned that as more people receive the vaccine, it is natural that they will also be responsible for a larger proportion of COVID-19 infections, and this study alone was not enough to draw any conclusions. The incident prompted the CDC to revoke a recommendation it issued just a few weeks earlier and urge vaccinated people to wear masks again.

However, Gandhi said the specific details of this cluster of cases could make this outbreak particularly serious.

«Частота легких симптоматических вспышек в этой ситуации была выше из-за большого количества активности в помещении и смешивания людей с разным прививочным статусом», — сказала она.

Meanwhile, a much larger CDC study of infections in New York State recently published, found that breakthrough infections have risen steadily since May, accounting for nearly 4% of cases by mid-July. The researchers warned that factors such as easing public health restrictions and the spread of the highly contagious delta variant could influence the results.

You may be interested in: top New York news, stories of our immigrants and helpful tips about life in the Big Apple - read it all on ForumDaily New York.

Another CDC case study from Colorado found that breakthrough infection rates in one county, Mesa, were significantly higher than the rest of the state, at 7% versus about 5% in the state. The report suggested that this may be due to the wider prevalence of the delta variant here, but it also noted the age of the patients in Meza and the lower vaccination rate may have played a role.

Research outside Israel seems to support the idea that protection against serious illness wanes in the months following vaccinations, and more recently that breakthrough cases could eventually lead to an increase in hospital admissions. The information is preliminary and serious breakouts are still rare, but it confirms the fact that some people will need revaccinations in the coming months.

Case studies and data from some US states have similarly shown an increase in breakouts over time. But as the delta variant is also growing, it is difficult to say whether the weakened immunity to any type of coronavirus infection is to blame, or whether vaccination is particularly ineffective against the delta variant. Of course, it can be both. Behavioral change among vaccinated people can also be a factor as they return to community gatherings, travel and dine in indoor restaurants.

Все это говорит о том, что некоторые факты на данный момент хорошо установлены. У вакцинированных людей, инфицированных этим вирусом, гораздо меньше шансов попасть в больницу, гораздо меньше шансов на интубацию и гораздо меньше шансов умереть от болезни. Нет сомнений в том, что вакцины обеспечивают значительную защиту. Но значительная часть населения страны — почти 30% взрослого населения США — не была вакцинирована, и это вместе с заразным вариантом Дельта, что подтолкнуло страну к новой волне вспышек.

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«Общая картина заключается в том, что вакцины работают, а причина резкого скачка в США в том, что у нас слишком мало вакцинированных», — сказал Фриден.

В определенной степени ожидаются случаи прорыва любого вируса. В клинических испытаниях ни одна вакцина против COVID-19 не была эффективной на 100% — даже самые лучшие вакцины никогда не были эффективны. Чем больше циркулирует вирус, тем выше риск возникновения инфекционных заболеваний. Также часто некоторые аспекты вирусного иммунитета со временем естественным образом ослабевают.

So far, there are simply more questions than answers. Are breakthrough infections due to the delta variant, weakening of the immune system, or a return to normal life? Are vaccinated people more vulnerable to serious illness than previously thought? How common are breakthrough infections? One can only guess.

«Мы должны принимать решения в области общественного здравоохранения на основе несовершенных данных», — сказал Фриден.

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