COVID-19 vaccines are still strictly controlled to rule out rare side effects.

After a very effective follow-up that has already led to the disappearance of thrombosis in those who received the AstraZeneca vaccination, 3 new potential adverse reactions resulting from the Pfizer and Moderna vaccines are currently being studied.

In a report published by the Spanish magazine "sabervivir", writer Pabelbo Copi del Amo says that Covid-19 vaccines are new, but they are subject to follow-up to the fullest extent to analyze any possible new effects that they may cause in very rare cases.

This is being done by the European Medicines Agency's Safety Committee, which has announced that it is studying 3 potential negative effects of both vaccines based on messenger RNA technology.

The new negative effects are:

Erythema multiforme:

It is an allergic reaction in hypersensitive people that causes a rash on the skin, and this can involve the internal mucous membranes of the body (such as the mouth or nose).

As an allergy problem, it is related to the immune system.

This rash can be painful and usually disappears after a few days.

Two effects related to the kidneys are:

Glomerulonephritis:

This is a swelling of the tiny filters in the kidneys.


Nephrotic syndrome:

It involves greater permeability of the kidneys and the loss of excess protein through the urine.

People with these conditions may have foamy or bloody urine and feel more tired.

Both vaccines can also cause fluid retention and swelling in the eyelids, abdomen, or feet.

But the relationship between these side effects and the vaccine is unclear.

The "limited number of cases" is mainly associated with patients who have already had kidney problems and have relapsed.

Both vaccines (Pfizer and Moderna) can cause fluid retention and swelling in the eyelids, abdomen, or feet (Pixabe)

Disappearance of clots

The author explained that the evidence that drug monitoring is effective, and that the steps being taken are going in the right direction, is reflected in the other rare effects that caused the greatest concern, which is the appearance of clots with vaccines.

According to the UK's most recent case registry, no cases of thromboembolism have been reported since the decision was made to suspend the adoption of AstraZeneca vaccination in people under the age of 40.

This measure was taken in Spain and other European countries a long time ago, and extended to all people under the age of 60.

The author pointed out that these vaccines, in rare cases, caused an increase in clots and a decrease in blood platelets, which facilitates the formation of blood clots and blockage of blood vessels.

This is a rare effect of vaccines based on viral vectors, that is, that use another virus to transmit a coronavirus protein that triggers the immune response.

These vaccines are AstraZeneca and Johnson & Johnson, in addition to the Russian vaccine, Sputnik V.

British calculations indicate that one case of every 50,000 people who received the vaccination is recorded for the population under the age of 50 years.

It has nothing to do with menstrual disorders

Regarding the notifications of some women who experienced menstrual irregularities after receiving the vaccination, the European Medicines Agency's Safety Committee does not currently see any relationship between the menstrual cycle and the vaccines.

The agency has indicated that these types of disorders are common and should not have any negative impact.

The European Medicines Agency's Safety Committee states that "causes of menstrual irregularities can range from stress and fatigue to pre-existing medical problems such as fibroids and endometriosis."

It should be noted that the vast majority of adverse effects described, proven or suspected only are not reversible, but can be treated.

Moderate effects such as fever and discomfort last for a few hours.

More serious side effects such as blood clots can be fatal, but in cases that are treated in time, the condition is reversed by transfusion of blood plasma or medications.

The writer warned that the risk of infection with the Corona virus threatens people of all ages, even children have been admitted to the intensive care unit.

There is no doubt that vaccination will solve many problems, and this is a statistical fact.

All you have to do to check this is to look at the mortality rates from a year ago to now.