The Centers for Disease Control and Prevention's vaccine safety group is investigating reports that a 'small number' of teens and young adults who have been vaccinated against coronavirus have experienced heart problems days after receiving their second jab.

The condition, known as myocarditis, results in an inflammation of the heart muscle which can occur following certain infections.

Very little detail was provided by the safety group which stated there were 'relatively few' cases which may even be completely unrelated to vaccination.