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Home Science & Tech

Mixing of COVID vaccines

June 10, 2021
in Science & Tech
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Mixing of COVID vaccines
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In news- India is planning an exercise to investigate if it can immunise people using a “mix and match” of different Covid-19 vaccines. 

More information-

  • It means following up one dose of a particular vaccine with a second dose of a different vaccine.
  • This is called “heterologous” immunisation.
  • At present, India in its vaccination programme is currently using Covishield, Covaxin and Sputnik V vaccines and this practice has not been approved yet.
  • Mix and match of Covid-19 vaccines have benefits like better immune response, provide wider protection against certain mutations or variants of the SARS-CoV-2 virus, and plug the shortage in vaccine supply.
  • The concerns include the safety of mix and match, untested combinations, differences in the shelf life of  vaccines, their shipment and storage conditions and contraindications like their side-effects.
  • Though mixing and matching of vaccines has been tested for decades, especially for viruses like Ebola, most combinations had initially been restricted to vaccines that use the same technology.
  • In India, combinations of rotavirus vaccines have also been used and tested out. 
  • In the US, the Centers for Disease Control (CDC) in January allowed a mix and match of the Pfizer and Moderna vaccines for COVID (both mRNA jabs), under “exceptional” circumstances.
  • Canada, the UK and countries in the EU have offered their younger population the Pfizer or Moderna vaccine as an alternative to AstraZeneca. 
  • Spain and South Korea have also been looking into a mix and match of these vaccines.
  • Russia has been planning on testing a combination of the AstraZeneca and Sputnik V vaccines.
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Source: Indian Express
Tags: Indian expressPrelims

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