Damage to a blood vessel wall thickening would increase the risk of heart attack and stroke later in life , according to a report released by the European Heart Journal and the BBC reported on Wednesday ( 03/05/2014 ) .
The study, involving more than 2,000 children aged three to 18 years , shows damage occurs if both parents smoke .
Experts say there is no level of " safe " from exposure to second-hand smoke .
Research conducted in Finland and Australia reveals how the physical effects that arise when the child grows up in a house full of smoke .
Ultrasound scan showed a change in the main blood vessel walls extending from the neck to the head of the children whose parents smoke .
