To fall sick or get fever

I’ve always heard that it’s very much essential that you should fall sick or get fever atleast once a year so that your defense mechanism remains active.How true is that?How many of you agree with this?

Re: To fall sick or get fever

I don't know if it necessary, but if happens, it's normal. Our defense is always active fighting so many things everyday. We only catch a few things our of the hundreds that come our way because we have good immunity. Some things we can't control.