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These are the people who will not be able to get the vaccine in Spain

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During last Tuesday, December 8, the United Kingdom started his mass vaccination against Covid-19, starting with the already famous Margaret Keenan, the first woman to volunteer for such vaccination (considering that several thousand people have already been vaccinated during clinical trials, of course). With Keenan, the Pfizer vaccine has already made history.

However, the Adverse effects have also started, and some already They brand the UK as “hasty” not having waited for the European authorities to certify the safety of the vaccine; even though United States and FDA yes they have already.

The reality is that, as with any vaccine and any drug, the Pfizer vaccine will not be totally and absolutely safeIt won’t be zero risk and it won’t be for everyone. Not even the known and studied flu vaccine meets all these premises.

Therefore, in this text we will review which people could not be vaccinatedThese cases are very specific, according to the Pfizer Covid-19 BNT162b1 vaccine technical data sheet. The reality is that the warnings that the same Pfizer data sheet contains are very similar to other vaccinesBut they should not be forgotten or taken for granted.

Under 16

One of them is the safety and efficacy of the vaccine regarding age: it has not been possible to establish these parameters in children under 16 years of age; although adolescents as young as 12 years old participated during clinical trials, according to available data. Therefore, its use in younger ages would not be recommended.

On the other hand, those individuals who suffer some clotting disorder, or receive some type of anticoagulant therapy (such as acenocoumarol or Sintrom, warfarin, or known as NOACs or new anticoagulants) should not receive the vaccine. In these cases, intramuscular injection is contraindicated; and the Pfizer vaccine requires an injection of these characteristics at the deltoid level.

However, as is the case with the flu vaccine, it is specified that vaccination is valuable if the benefits clearly outweigh risks of intramuscular injection.

Next, there is the case of individuals who suffer some type of immunosuppressed disease or some type of immunosuppressive therapy (suffering from AIDS would be an example of the first case, while taking biological drugs against rheumatoid arthritis would be an example of the second case). In such cases, the response to vaccine may be less than expected, although it would not be contraindicated.

During pregnancy

At the moment, vaccination is not recommended during pregnancy or lactation (contrary to what happens with the flu vaccine). In this case the recommendation is due to lack of data:

-For the moment, the possible toxicity of the Pfizer vaccine regarding reproductivity (Animal studies have not been completed).

-Must be exclude pregnancy in case of vaccination women of childbearing age.

-It’s recommended avoid pregnancy at least two months later of the second dose.

-No vaccination is advised during lactation.

-Effects unknown or impacts of the vaccine on fertility.

Pharmacovigilance

As you can see, at the moment many of the warnings about Pfizer’s novel mRNA vaccine are due to lack of data, and not to adverse effects or problems caused with the use of it as such.

Interactions between this vaccine and other Covid-19 vaccines are unknown. And of course there are still many other unknown interactions between the use of the vaccine and the multitude of drugs currently available on the market.

For its part, for the moment, clinical trials in this regard suggest that there would be no greater efficacy among those individuals at risk (individuals with obesity, asthma, chronic lung disease, diabetes mellitus or hypertension) compared to those without other previous diseases.

Likewise, there are no data on whether the vaccine can reduce complications after contracting Covid-19, as is the case of hospitalizations, ICU admissions or mortality as such.

Therefore, it is probable that the current mass vaccination in the United Kingdom and the probable immediate beginning in the United States, will result in a relatively fast new phase within the manufacture of drugs and vaccines: pharmacovigilance, a phase where much more data is collected on the drug in question once its efficacy and safety have been tested in smaller groups (in this case, clinical trials of more than 19,000 patients for the Pfizer vaccine).

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