There's a difference between mandatory and voluntary. The govt. is reaching beyond, again.
I agree, but if something has no real downside, why not make it mandatory? The only downsides I see are:
1) the monetary cost,
2) people afraid of needles/getting blood drawn, and
3) people paranoid about.. whatever.. the evil government-doctor conspiracy.
And anyway, I don't actually advocate making it literally mandatory, but perhaps.. strongly reccomended. Like pap smears and mammograms and menigitis vaccination.