In RESPONSE to the article on vaccine safety (Mail, October 7),Oxford father Tony Bateson is correct to be worried about the mercury preservative Thiomersal.

Mercury is, in fact, a graded poison and is listed as such in American labs.

It is the second most toxic poison, has been used in rat poison and was banned in dentistry.

This poison is still in use today because it’s cheap to buy.

Marie Alywin, Green Hitchings, Great Milton