Why Covid vaccine effective against new Omicron variant

The currently available vaccines against Covid-19 appear to be effective against the newly detected Omicron Covid variant, South Africa's health minister said. The new variant, known as B.1.1.529, has been detected in small numbers in South Africa. The World Health Organization (WHO) on Friday assigned the Greek letter Omicron to the variant. According to South African Health Minister Joe Phaahla, vaccines are still effective in preventing severe Covid from the variant, CNBC reported. Phaahla added that the Omicron variant may be more transmissible due to its genetic composition.Meanwhile, world's major manufacturers of Covid-19 vaccines said Friday that they are working to quickly investigate and adapt their shots to a new and highly mutated strain of the virus . The WHO said the new strain may pose a higher risk of reinfection than past mutations of the virus. Pfizer and BioNTech said they are investigating the new, heavily mutated variant, the report said. The companies said they can adapt their mRNA vaccine within six weeks and start shipping batches within 100 days if an escape variant is identified. Moderna, Johnson & Johnson and AstraZeneca have also stated that they are investigating and testing the new variant. Moderna said it will test three booster candidates against Omicron, including a higher dosage level. The company will also develop a booster dose specific to the variant, it said in a statement. The variant, which emerged in South Africa, has about 50 mutations, more than 30 of which are on the spike protein that allows the virus to bind to human cells. While the spread of the new variant is still in its early stages, it is not yet clear how severe an infection would be to a vaccinated person. With new Covid-19 clusters and the Omicron variant posing fresh pandemic threats, Karnataka Chief Minister Basavaraj Bommai on Saturday ordered a slew of measures that includes heightened border checks and asking educational institutions to postpone their public events. Negative RT-PCR reports will be compulsory for everybody entering Karnataka from Maharashtra and Kerala,” Revenue Minister R Ashoka said, after an emergency meeting chaired by Bommai. Ashoka said the government has ordered round-the-clock checks at the Kerala and Maharashtra borders - Mangaluru, Mysuru, Chamarajanagara and Kodagu districts. “There will be strict vigil, especially with Kerala that continues to reel under Covid-19,” he said. All Kerala students who entered Karnataka 16 days ago will be made to take the RT-PCR test. “And, all hostel students who have tested negative will be made to undergo another test after seven days,” Ashoka said, adding that Covid-19 testing will be intensified in medical and nursing colleges. Schools and colleges have started organizing cultural events. We have decided to ask them to defer all such events. We even discussed the need to order cancellation of seminars,” Ashoka said. Further, the government has ordered that all employees working in public offices, malls, hotels, theatres and other such commercial establishments must have two doses of the Covid-19 vaccine. “If they don’t have double-dose, they won’t be allowed to work,” he said. The Bommai administration, which is piggybacking on the post-pandemic economic recovery, is not considering any drastic measures. “We did not discuss imposing curbs,” Ashoka said. “We’re currently in the advisory phase, but depending on the Covid-19 numbers in the coming days, we’ll have to take drastic steps,” he said.