Lahore, 17th June: Researchers are gathering data to see if it’s safe and effective to mix and match two-dose COVID-19 vaccines.
Researchers around the world are still working to find out if mixing two different doses of coronavirus vaccine is safe or not.
Dr. Kate O’ Brien, director of the World Health Organisation’s vaccine unit noted that the authorized COVID-19 vaccines around the world are all designed to refresh the immune system to produce antibodies to fight the virus. However, she said that the way they stimulate the immune system of every individual varies.
She added that based on the basic principles of how vaccines work, we do think that the mix-and-match regimens are going to work.
Scientists at the UK’s Oxford University are testing combinations of the two-dose COVID-19 vaccines made by AstraZeneca, Moderna, Novavax and Pfizer-BioNTech. Similar trials are also being done in Spain and Germany.
With limited data at hand, it has come under notice that a shot of AstraZeneca followed by the Pfizer vaccine is safe and effective. The combination also appears to come with slight side effects of aches and chills.
Lawrence Young, a virologist at the University of Warwick in the United Kingdom observed that this might be due to the mix and match of different types of vaccine which can often produce a stronger immune system.
After the reports of the AstraZeneca vaccine creating rare blood clots in some individuals, many European countries including Germany, France and Spain recommended people who got their first shot of AstraZeneca to get Pfizer or Moderna vaccine as their second shot.
However, in Britain and Canada, health officials recommend that people should get the same vaccine for their second shot if possible.
They say if they had their first shot of AstraZeneca then they are advised to go for another vaccine only if they have a history of blood clots or other conditions that might put them at higher risk of blood clots.
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