Analysis: scramble to stop spread of South African variant makes sense but may already be too late
When the coronavirus pandemic was in its infancy, one of the common silver linings scientists mentioned was the virus’s slow rate of mutation. It raised the hope that the virus lacked the agility to rapidly evolve around human immunity – whether from previous infection or vaccine. The virus is certainly slow to mutate by some standards. Sars-CoV-2 typically acquires two single letter changes in its genetic code a month, about half the rate seen in influenza.
So why are so many new variants emerging? At the heart of the problem is the fact the global pandemic is raging. Every new case is a chance for mutations to arise, spread and build up. In the simple arithmetic of evolution, when a virus mutates and gains an advantage it can rise above the others.
Continue reading…
Source: The Guardian