There was an article in The Sunday Times over the weekend which talked about the important of getting medical insurance early while you are still young and healthy.
This is because if you wait until you have a medical condition before getting insurance, that condition will not be covered.
Or even worse, your entire application can be declined.
Better to Get Medical Insurance While Young and Healthy (Sunday Times)
Please also read the portion in the green column “Think before you switch”.
Do not make the mistake of switching shield plans as this person found out.