Does anyone know how effective one dose of the covid vaccine is?

.. against covid AND the variants?

My essential worker friend has one dose of it and I’d really like to see him, physically distanced,, outdoors and masked still though

(Im not eligible yet in my country)

Here in Canada, you get the second dose 4 months later, not 2 wks like the states... ugh

😩😩🥲🥲

I havent seen a soul since this all started and just.. I need it 😣😖