Pfizer has announced details of its trial of a slightly tweaked Covid-19 vaccine, specifically designed to work against the highly transmissible Omicron variant.
The dominant strain of the virus saw the need for global restrictions to prevent the spread, as the highly contagious variant managed to sweep across the globe in a matter of months.
After it was discovered that the side effects were far less severe than those caused by the Delta strain, many countries began to move towards pre-pandemic life, however, there are suggestions that more will be needed to suppress any more contagious variants in future.
