coronavirus variant
South African variant found in 81% Covid-19 samples since third week of March
The South African variant has accounted for 81% of the positive cases in Dhaka since the third week of March 2021.
A research study conducted by the icddr,b has revealed this information.
The research team at icddr,b analysed genomic sequence data of 57 samples of the SATS COV-2 virus in Covid-19 positive patients between March 18 and 24. Forty-six of those samples were found to be the same as the South African variant of novel coronavirus.
Also read: Bangladesh shatters its all-time records of daily Covid cases
This variant is said to have greater transmissibility and harbour new genetic changes, which may impact clinical manifestation and vaccine effectiveness.
Icddr,b identified the first UK variant on 6th January 2021; however, the SARS-CoV-2 sequence database at GISAID.ORG indicated that the UK variant was already circulating in December 2020 in the country. The UK variant gradually increased over time until the second week of March 2021, with the highest positivity rate (52%).
However, a dramatic change in the distribution of variants was observed when the South African variant appeared. It became the most prevalent variant during the third week of March 2021 by replacing other variants. Most remarkably, the South African variant occupied 81% of the variants in the fourth week of March 2021, according to icddr,b website.
Also read: New variant may be behind Covid surge in Bangladesh: Experts
In light of this finding, icddr,b urged all to abide by the restrictions recently announced by the Government of Bangladesh.
Vaccines may not work against variants
The head of the World Health Organization has expressed his concerns several times in the past that the vaccines developed so far might be less effective against the variant first detected in South Africa.
Tedros Adhanom Ghebreyesus said at a media briefing that South Africa’s decision to suspend its vaccination campaign using the AstraZeneca vaccine is “a reminder that we need to do everything we can to reduce the circulation of the virus with proven public health measures.”
Also read: UN: 'Concerning news' vaccines may not work against variants
South Africa has suspended plans to inoculate its front-line health care workers with the Oxford-AstraZeneca vaccine in February this year after a small clinical trial suggested that it isn’t effective in preventing mild to moderate illness from the variant dominant in the country.
Preliminary data from a small study suggested that the AstraZeneca vaccine offers only “minimal protection against mild-moderate disease” caused by the variant in South Africa. The variant appears more infectious and is driving a deadly resurgence of the disease.
Read How to strengthen your immune system to prevent COVID-19 infections?
New variant may be behind Covid surge in Bangladesh: Experts
Amid a sudden upsurge in coronavirus cases, health experts fear that a highly transmissible variant of the deadly virus might have appeared in Bangladesh through mutations.
They think a comprehensive study and genome squeezing is necessary to examine whether the mutations have led to the new variant contributing to the upsurge in Covid cases in Bangladesh.
Meanwhile, a team of Bangladeshi researchers in collaboration with Monash University in Malaysia found that coronavirus mutated 4,604 times in Bangladesh from April to December last year.
Examining 371 genome sequences of the virus, they found 34 unique mutations in Bangladesh.
The researchers laid emphasis on conducting more research on the unique mutations as they think any of them can be deadlier and the cause of the recent spike in the virus cases.
Also read: Virus variants, vaccine inequity responsible for rising Covid caseload: WHO
Causes behind the fresh wave of COVID-19 in Bangladesh
Talking to UNB, noted virologist Nazrul Islam, a member of the national technical advisory committee formed to tackle Covid-19, said it seems that a fresh wave of the coronavirus has begun in the country.
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