AstraZeneca's vaccine, developed in conjunction with the University of Oxford, was one of the first to be announced against COVID-19. We tell you what are its possible side effects and what are the most common adverse reactions.
In several municipalities of Mexico City, as well as in states such as Campeche, AstraZeneca's vaccine was chosen to vaccinate people between 30 and 39 years of age. This vaccine is one of the most versatile given its low cost and the flexible storage temperature it requires.
One dose costs three dollars (equivalent to 60 Mexican pesos) and is perfectly preserved in a refrigerator at a temperature between 2ºC and 8ºC, unlike vaccines such as Pfizer's or Moderna's, which have a much higher price and require more delicate care.
What are the side effects of the AstraZeneca vaccine?
Among the most common side effects of this vaccine is pain at the injection site, headache, and fatigue. However, these three reactions occur in less than 50% of people. General malaise and muscle pain are also common, affecting less than 40% of people. Symptoms such as fever and chills have been reported by less than 30%.
Among the reactions that may also occur are nausea and diarrhea. Few patients report symptoms such as dizziness, drowsiness, and even skin reactions. However, in the vast majority of cases, these reactions disappear within 48 hours.
Currently, there is controversy over whether this vaccine has more noticeable side effects among younger people. In an interview with the BBC, scientist Andrew Pollard, who coordinated the clinical trials of this vaccine, admitted that age could be an important factor in terms of adverse reactions.
"The older you are, the fewer the side effects; those over 70 have almost no side effects," he stated.
However, these observations have not been confirmed by any subsequent study. In any case, doctors say that these adverse reactions should disappear within two days. Otherwise, it would be necessary to seek medical attention. Those who experience discomfort can take paracetamol.
How effective is AstraZeneca's vaccine?
The technology used in this drug has been used successfully in vaccines such as the tuberculosis vaccine in the past. Like the Johnson & Johnson vaccine, it consists of an adenovirus vector that instructs cells to generate the antibodies that enable an optimal immune response.
Following the latest studies published in March 2021, scientists and health authorities have determined that this vaccine is effective and reliable. It is 79% effective against symptomatic disease and is also 100% effective against the most severe cases of COVID-19.