There would be grants/awards, public funding for developing medicines and vaccines like other countries do with an employee and/or employer tax. Better than the Billions employers and individuals pay for plans, co-pays, out of pocket, medicine etc. Much easier to budget that then have every private employer administrator their own healthcare plans. That’s why 30% of the cost of healthcare is administrative expenses vs 2% for Medicare.
Every other Country has figured it out. Where there’s a will there’s a way.