New variants will hinder but not stop our battle against Covid – The Irish Times

Thanks to vaccines it looks like we will win the war against Covid-19, but the rules of engagement have changed as a result of the emergence of variants, and it could be a long and rocky road before we are out of the woods and back to normality.
Many viruses are susceptible to mutation as they rapidly multiply inside human cells, allowing new variants to emerge. This has facilitated more transmissible virus variants, notably in the UK, South Africa and Brazil, to become dominant.

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