UK scientists have identified a group of mutations in overlooked DNA in tumour cells that may increase the chances of survival for people with bowel cancer.
A new coronavirus variant found in Bristol may be able to infect people who have already had Covid-19 or who have been vaccinated but the jabs will still protect against severe disease, experts have said.
Coronavirus mutations similar to those in the UK variant could arise in cases of chronic infection, where treatment over an extended period can provide the virus multiple opportunities to evolve, scientists say.
Ever since the new coronavirus first appeared in Wuhan, China, in 2019, it has mutated thousands of times resulting in countless variants.
The Moderna coronavirus vaccine, due to arrive in the UK in the spring, is effective against all emerging mutations of the virus that have been detected to date, the company has announced.