Cold Unit News Today

Should the first COVID human challenge trial also be the last?

The science behind why border restrictions will not stop Covid variants Professor David Livermore also explains why a slow lifting of lockdown is riskier than a rapid removal of restrictions Mutations are errors that arise as genes are copied. They occur frequently with RNA viruses such as Sars-Cov-2. Most cripple the virus, making them evolutionary dead ends. Occasionally, though, one confers advantage and the mutant’s progeny proliferate. It may even become the dominant virus type, locally ...