Russia, Denmark, Germany, Spain, South Korea are among the few nations Researching the mixing and matching of Covid-19 vaccines for her second recordings.
Much of these experiments are based on the fear of the global spread of the Delta variant. Europe’s Center for Disease Prevention and Control estimates that the Delta variant will make up 90 percent of the strains in circulation in the European Union alone by the end of August.
The US Food and Drug Administration (FDA) and the European Medicines Agency have not yet made recommendations on vaccine cocktails.
The countries are adapting this strategy due to an epidemiological crisis. To date, global evidence has suggested a good safety profile when mixing vaccines. For countries lacking the vaccine, this could be a solution to speed up vaccinations.
READ | Covaxin, Covishield Mixture: Cocktail Vaccine Safe, Finds ICMR Study
The Senior Scientist for the World Health Organization, Dr. Soumya Swaminathan, advised against mixing vaccines and called it a “dangerous trend” with no data on health effects. She said such decisions should be left to health officials.
Dr. Swapneil Parikh said adverse events need to be monitored. “Further studies are being carried out to work out the scientific basis. An Oxford study found that a second shot of Pfizer vaccine after a four-week interval from AstraZeneca resulted in a better immune response. Another study on the vaccine cocktail Moderna and Novovax is also underway, ”he said.
How the world sees the mix of Covid-19 vaccines
RUSSIA
Russia’s direct investment fund calls itself a pioneer in the vaccine cocktail. Their attempts at mixing Sputnik V with the AstraZeneca shot resulted in no serious side effects and no groundbreaking cases among volunteers. The full results of the study will be released this month.
DENMARK
A first shot of the AstraZeneca vaccine with a second dose of either Pfizer-BioNTech or Moderna’s vaccine provides “good protection,” Denmark said.
GERMANY
Germany has decided to offer boosters of mRNA vaccines – Pfizer / BioNTech and Moderna – to vulnerable people, pensioners and people with weak immune systems from September, regardless of the vaccines used for the first vaccination.
SOUTH KOREA
A study from South Korea found that mixed vaccination of an AstraZeneca shot first and then a Pfizer vaccine increased neutralizing antibody levels six times more than two doses of AstraZeneca.
THAILAND
Thailand opts for China’s Sinovac as the first dose with AstraZeneca’s shot for the second dose for added protection. This is the first time a Chinese vaccine has been mixed with one made in the West.
CANADA
Canada’s National Advisory Committee on Immunization recommended mixing vaccines, stating, “An mRNA vaccine is now the preferred second dose for people who have received a first dose of the AstraZeneca / Covishield vaccine.”
SPAIN
The Spanish Bioethics Committee urged people to receive an mRNA vaccine after an initial dose of AstraZeneca. However, they also said that taking a second dose is crucial, even if that means taking another dose of the AstraZeneca vaccine.
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