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Even if you have been vaccinated: 4 things that increase the risk of contracting corona

Vaccinated two or three times?

What are your chances of getting Corona anyway and what are the four factors that can reduce or increase your risk of getting covid-19

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• Corona

• Vaccine for corona

• covid-19

• Antibodies

Walla!

health

Monday, 11 October 2021, 07:33

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In the video: Study confirms: Out of 2.5 million vaccinated - only 54 had a line in myocarditis (Photo: Gregory Bado)

About two weeks after you are vaccinated, your anti-corona antibody level is at its peak and you are considered fully vaccinated.

But as some people have discovered in the fourth wave of the corona, even two full doses of the Covid-19 vaccine cannot guarantee 100 percent protection against infection.

Infection of vaccinated (in English it is called: breakthrough infection) looks quite similar to normal infection in corona, but it still has some important differences.

A study of corona symptoms shows that the five most common symptoms among vaccinated people infected with corona are: headache, runny nose, sneezing, sore throat and impaired sense of smell.

So far it sounds quite similar to the usual and familiar symptoms of the disease even among those who have not been vaccinated.

But without the vaccinated there are two other common symptoms that are spared from the vaccinated - fever and persistent cough.

One study comparing vaccinated and unvaccinated symptoms found that a vaccinated person infected with corona had a nearly 60 percent (58%) chance of developing a fever.

Most infected vaccinators described their experience of the disease as a "mild cold."

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Another difference is the risk of being hospitalized due to the Corona disease: the vaccinated have a much lower chance of getting to the hospital due to their symptoms and yes, they will suffer fewer symptoms overall in the early stages of the disease and are less likely to suffer long-term symptoms.

Have you been vaccinated?

Even if you are infected, chances are you will not have a fever.

Sick man (Photo: ShutterStock)

What increases the risk of vaccinated people getting infected with corona?

A study conducted in the UK found that the infection rate of vaccinated stands at 0.2 per cent, which means that one in every 500 people is infected with corona despite being vaccinated.

However, the chance of getting infected despite the vaccine is not equal for everyone, and there are 4 factors that can be marked as risk enhancers:

The clinical studies conducted prior to the issuance of approvals for the various corona vaccines as well as the truth data that continued to be collected after the start of the global population vaccination gave each of the approved vaccines a sort of score regarding the relative reduction it gives in the chances of infection. Pfizer's vaccine (in which the Israeli population was vaccinated) has a 95 percent efficacy in reducing infection, Modern's vaccine is very close to it with an efficacy of 94 percent. Other vaccines that have been approved and given worldwide have presented less effective data: the Johnson & Johnson vaccine with 66 percent, the Astra-Zenica vaccine with 70 percent. So someone who has been vaccinated with one of the last two on his face has slightly less good protection from infection than someone who has been vaccinated with Pfizer or Modern dishes.

The length of time that elapses since the vaccine is administered turns out to be one of the most significant factors on the level of antibodies and hence also on the quality of vaccination of those vaccinated against the corona virus.

This is why Israel has decided to vaccinate the population with a third booster dose of the vaccine, and it seems that the rest of the world will follow suit, after the US has already started giving the booster and so have several European countries. About the fact that the immune resistance as a result of Pfizer vaccines subsides during the 6 months after the first vaccine, the data on the antibody status in the six months after the second vaccine dose are still processed, but they seem to behave similarly - hence the need for the third booster dose.

After 6 months, the amount of antibodies decreases, and with it the degree of your protection.

A man who was vaccinated with the booster dose of the Corona vaccine, an immune complex of Clalit Health Insurance Fund in Ramat Gan, September 2021 (Photo: Reuven Castro)

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3. Variants

We know that the virus we are dealing with today is not exactly the same one that injured our lives almost two years ago, but new and slightly upgraded versions of it. Certain mutations that the virus underwent during its travels around the world brought us a variety of variants with exotic names, which were eventually replaced by more generic nicknames of Latin letters - with the delta being the dominant variant today in most countries in the world. The efficacy percentages of the vaccines (those from the previous section) for example, were calculated at the experimental stage relative to the original version of the covid-19 virus, but until they were approved and given to the general population these vaccines had to deal with slightly different versions of the virus. Thus, the efficacy percentages of Pfizer's vaccine, which stood at 95 percent against the original virus, dropped slightly to 93 percent against the alpha variant and to 88 percent when dealing with the delta variant. So the type of variant you have been exposed to (which you usually have no way of knowing) will also affect your chances of getting infected even though you have been vaccinated.

All the data mentioned in this article and in the studies it cites refer to the weighted average risk for the general population.

It is important to remember that each of us is an individual case, and each person's risk of infection is the result of a complicated equation consisting of the type of vaccine he received, how many doses and when, what his antibody level is and how much he is exposed to the virus.

The strength of the immune system usually decreases with age and also chronic or long-term medical conditions can weaken the immune response.

These are the reasons why the elderly and people with conditions of immunosuppression tend to develop fewer antibodies following corona vaccines and are considered more vulnerable to infection.

In most countries these groups have been given priority in the vaccine, which means they have been vaccinated in the earlier stages, to protect them.

But it also means that their immune defenses start to go down sooner.

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