text: By Michelle RobertsHealth editor, BBC News online Public Health England has designated it as a 'variant under investigation' (VUI), meaning it is on their watch list, but not one they are immediately concerned about. It has a mutation in common with the South Africa and Brazil variants. That change, E484K, may help the virus evade some immunity from vaccination or prior infection, experts believe. The cases were first identified on 15 February by the UK's variant surveillance system. Experts suspect it originated in the UK. All 16 individuals who tested positive, and their contacts, have been traced and advised to isolate. PHE said the cases were geographically spread across the UK. And it confirmed that surge or mass testing would not be necessary - this is only done for variants of concern (VOC), such as the Brazil one. The UK now has 8 variants on its watch list - 4 VUIs and 4 VOCs. Hunt continues for Brazil variant Most recently, officials had been trying to track down a person in England known to have been infected with the Brazil VOC. The search was narrowed to 379 households in the south of England, and the case was traced to Croydon. Health Secretary Matt Hancock has said incidents like this are rare and only occur in around 0.1% of tests. It's not unexpected that variants are appearing or that the virus will continue to change. All viruses mutate as they make new copies of themselves to spread and thrive. But some changes may affect how well current vaccines work. Scientists are looking at tweaking coronavirus vaccines to keep pace with the new, emerging variants to ensure that they continue to offer high protection against the disease as the virus mutates. The UK's drug regulator the MHRA has said new vaccines can be fast-tracked through the approval system without "lengthy" clinical studies.
summary: UK ಯಲ್ಲಿ ಕೊರೋನಾ ವೈರಸ್‌ನ ಮತ್ತೊಂದು ಹೊಸ ರೂಪಾಂತರದ 16 ಪ್ರಕರಣಗಳನ್ನು ವಿಜ್ಞಾನಿಗಳು ಗುರುತಿಸಿದ್ದಾರೆ.