In Poland, it's free (i.e. covered by your taxes) as long as you have a taxable income. If you don't pay any taxes, you can opt-in for around $90 a month.
What percentage of your income is deducted for health benefits? Is there additional private coverage available like in Canada, where citizens can opt to purchase supplemental coverage or opt for perks like private hospital rooms, etc?
if it's covered by your taxes, is it really free then?
No, but if the system is run more efficiently, it can be cheaper.
Americans pay more in taxes for heath coverage (combined) than anyone else...