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There has been talk of a combination mRNA vaccine for Covid-19 and influenza for a long time, now the US Biotechnology company Moderna has tested one. It showed that vaccine has a similarly good or even better impact with two vaccines for over 50-year-olds or even better than the separate vaccination. This has shown a large -scale study by phase III with more than 8,000 test subjects who have just been published in the magazine of the American medical center (JAMA).
