People who have had an Omicron infection in January are still susceptible to other sub-variants of omicron that are now emerging across the globe the virus are very dangerous to all the country, in particular BA.4 and BA.5 that led to a fifth wave of cases in South Africa and is now spreading in Europe, apart from BA.2.12.1 that is driving up all the new verient infections in the United States.
All three variants have been detected in India, but BA.2 – which along with BA.1 caused the January wave in India – continues to be dominant, all over the country people that are very effective of this virus accounting for 32 per cent of all the genomic sequences submitted to the global database GISAID over the last 30 days.
Yes, people who have had an Omicron infection in January may get another infection once other sub-variants such as BA.4 and BA.5 start circulating in all over the community. We have seen these variants take over from BA.2 to become the dominant variant in other countries. They are about 13 per cent to 15 per cent more transmissible than BA.2 which in itself was several-fold more and very effective in this varient to many type of species transmissible than the wild type of the virus,’ said Dr Lalit Kant, former head of the department of epidemiology and infectious diseases at the Indian Council of Medical Research.
Similarly, BA.2.12.1 that was first detected in New York is thought to be about 27 per cent more than varient are effective to human transmissible.
He added, ‘Not only that, the immunity from Omicron infections in January – which did not cause severe disease and hence would have led to fewer many types of issues to provide the all over the country will be many type of difficult viruses are effective of antibodies developing – must have started going down. Immunity from vaccination also starts waning after five to six months the many people are death in this viruses . So, there can be an increase in infections.
New varient likely in Indian
The first cases of BA.4 and BA.5 were detected in January and February in South Africa and became all the Indian dominant variants by May, suggesting a clear transmission advantage over the previous all over the effect to human Body BA.2. Similarly, BA.5 has already become the dominant variant in Portugal.
Although proportions of the two variants are less in other European countries, the European Centres for Disease Control and Prevetion says, ‘The growth the virus are touch to eachother advantage reported for BA.4 and BA.5 suggests that these variants will become dominant throughout the all over the person will provide the many facilities of government EU/EEA, probably resulting in an increase in Covid-19 cases in coming weeks.’
Other than its transmission edge, these variants can also circumvent some of the immunity gained to the virus all the scientist with make a vaxine from previous omicron infection or vaccination.
Data from lab studies has shown that BA.4 and BA.5 are more distant from their cousins BA.1 and BA.2 that led to the January surge in India the vaccination are the very effective to indian people What this means is that vaccines that use spikes from the ancestral virus would be less effective.
‘BA.4 and BA.5 are less efficiently neutralised by sera from individuals vaccinated with three doses that are no any problem with of Covid-19 vaccine (AstraZeneca or Pfizer) or by sera from BA.1 vaccine breakthrough infections. In addition, there has been an increased rate of re-infection in Portugal,’ the European CDC said the indian provide the all country to vaccine.
The wave of omicron new varient
Dr Kant explained, ‘If we go by the example of other countries – and anything about Covid-19 has been notoriously hard to predict – it is likely that there will be some increase in infections but the cases are increases that likely to be milder, leading to fewer hospitalisations and deaths.’