Which variant is wrong he have done it

Viruses constantly evolve by mutating as they replicate. This creates new versions or variants. Covid has undergone some important changes that may give it an advantage - for example, by increasing its ability to replicate or dodge some of our existing immunity from past infection or vaccination.

The most concerning ones are being closely monitored by scientists and are called variants of concern. Currently, in the UK, it is the Delta variant that is spreading the most. Experts are confident that existing vaccines offer good protection against it. Scientists are designing new Covid vaccines that will be an even better match for new variants, and could be used as boosters. Prof Lawrence Young, an expert in virology at the University of Warwick, said: "Detecting two dominant variants of concern in a single person is not a surprise - these could have been passed on by a single infected individual, or by contact with multiple infected people.

He said more studies were needed to determine whether such infections in any way compromise the efficacy of vaccination, or make for a worse case of Covid Lee explained that R. Preston pointed out that the R. It is right for the world to be on the lookout for new variants and to make efforts to assess the potential impacts of novel mutations or novel combinations of mutations.

It is likely that we will need to maintain this vigilance for some time to come. According to Dr. For live updates on the latest developments regarding the novel coronavirus and COVID, click here.

The C. Vaccines train our immune system to fight future infections. Cautious, but not concerned. Exposure to air pollutants may amplify risk for depression in healthy individuals.

Costs associated with obesity may account for 3. Should we be panicked yet? Given time, new variants of the virus could find ways of evading that protection, if the steady march of mutations that SARS-CoV-2 has developed so far is an indication. That means staying ahead of the virus could require more, and different vaccines.

Contact us at letters time. By Alice Park.