That's a national issue, not a worker's rights issue, unless you're saying that employment is required for you to have healthcare. All citizens should have healthcare, regardless of their employment status.
It’s a worker’s rights issue when your healthcare is tied to your employment, as is the case for the majority of Americans.
And I'm saying it shouldn't be tied to your employment. Every citizen should have universal healthcare options, regardless of their employment status. Therefore it's a national issue, and not an worker's rights issue. If someone is disabled, or unemployed, or a small business owner, or whatever, they should still have healthcare. Life saving services should be completely unrelated to your work, or lack thereof.
Edit: and as far as I know, that's how it works in Europe, so it's not a right that European workers have, it's a right that all citizens have. Hopefully that clarifies why I said it's a national issue and not a worker's rights issue.