What we know

The Omicron variant has 30 changes to it including a small insertion in the spike protein and three small deletions. Around 50% of these changes are in the receptor binding domain – this is the part of the spike protein use to bind to human ACE-2, which is the enzyme the coronavirus targets to enter cells and infect a person. If there are mutations here this makes the spike protein less recognisable to the antibodies made in response to either a vaccination or natural antibodies.
The bottom line is that the Omicron is different.
It is a worry
The concern is that these changes above mean that the virus transmits more quickly. Early PCR tests showed that 90% of 1,100 new cases reported November 24 in a SA province were caused by the new variant. SA President Cyril Ramaphosa said that the average daily cases rose from 500 case in the previous week to 1,600.
It is also uncertain how bad it is (more…)