From Pfizer to AstraZeneca: which vaccines are approved in Mexico and what are their differences

In Mexico, the vaccination day against COVID-19 will end in 2022 (Photo: EFE / Sáshenka Gutiérrez)
In Mexico, the vaccination day against COVID-19 will end in 2022 (Photo: EFE / Sáshenka Gutiérrez)

Mexico is going through a key moment to face the coronavirus pandemic. On the one hand, two vaccines have already been approved by the Federal Commission for the Protection against Sanitary Risks (Cofepris), while infections at the national level keep several states of the Republic on high alert due to the pandemic.

At present, the two companies that got the vaccine approval to be applied as an emergency in the country are those of Pfizer and BioNTech and the recently accepted one made by Oxford and AztraZeneca. Both have particular characteristics that allow the patient to be protected from the virus by up to 95%.

The Pfizer vaccine began to be applied in the country on December 24 to health professionals who treat COVID-19 cases on the front line. A special feature of this vaccine is that It does not contain weakened or dead versions of the virus, rather, it is based on mRNA. This means that the genetic content of SARS-Cov-2 is introduced by the mRNA with the aim that the immune system has enough information to fight disease.

However, certain characteristics of the vaccine have generated obstacles in their transport and storage, since the doses They should be frozen at -70 degrees Celsius to avoid being unusable.

To be used, these must be transferred to another refrigerator between 2 to 8 degrees or to an ambient temperature of no more than 25 degrees to be used. Once at room temperature, they have a life time of two hours maximum.

Pfizer's vaccine is made from mRNA with the genetic content of the virus (Photo: Reuters / Dado Ruvic)
Pfizer’s vaccine is made from mRNA with the genetic content of the virus (Photo: Reuters / Dado Ruvic)

The doses must be diluted in 1.8 milliliters of Sodium Chloride 0.9% injectable, this will result in five doses of 1.3 milliliters. Side effects of the vaccine may include flushing, fever, fatigue, headache, colds, headache, vomiting, diarrhea, and muscle pain.

This vaccine It has to be applied in two phases, weeks apart and is 95% effective.

On the other hand, AstraZeneca’s newly approved vaccine it has some differences from Pfizer. Among its advantages, according to the BBC, are that it is easier and cheaper to produce. Besides this can be refrigerated in a standard appliance and it does not require degrees of freezing like its namesake.

This vaccine, for its part, it is a common flu virus that was genetically modified. Once it is injected, the planes of the known “Spike protein” of COVID-19. Thus the immune system begins to recognize SARS-CoV-2 as a threat.

Another of the similarities between vaccines is that AstraZeneca’s is also applied twice, but its effectiveness varies between 62 and 90% effective.

AstraZeneca's vaccine is made from a genetically modified influenza virus (Photo: Reuters / Dado Ruvic)
AstraZeneca’s vaccine is made from a genetically modified influenza virus (Photo: Reuters / Dado Ruvic)

The application of vaccines in Mexico will be carried out by the groups from highest to lowest risk depending on their degree of vulnerability, but the authorities have estimated that the campaign will end in mid-2022.

The groups were ordered as follows:

-Health workers, who are located in the first front to fight COVID-19 from (December 2020 – February 2021)

Remaining health personnel and people over 60 and more (February – April 2021)

– People from 50 to 59 years (April – May 2021)

– The fourth stage will include citizens aged 40 to 49 (May – June 2021)

– Finally, the rest of the population (June-March 2022)

MORE ON THIS TOPIC:

Myths and facts: this is what you should know about the COVID-19 vaccine after the new strain and cases of allergies

Coronavirus in Mexico: what are the side effects of the Pfizer-BioNTech vaccine

“We cannot lower our guard”: the second day of vaccination against Covid-19 began in Mexico

Leave a Comment