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Why are you shifting the burden of proof?
People who believe in the virus are making a scientific claim so they have the burden of proof. They have to offer 1 scientific proof for their claim.
Without a proof, What are we talking about?

as a matter of fact it's the quite opposite. It's a fact that covid-10 exists, every country acknowledges even countries that previously didn't believed so, as well as the vast scientific community. The average joe like you who don't believe this should state any proofs he got regarding its existence.

But i guess it's another conspiracy theory in which all the countries decided to take part in as well as the corporations as well as the vast majority of scientific community as well as the people that infected who probably are actors

It's a fact that covid-10 exists

Somehow they concluded that it exists.
i have a curiosity:
How did they end up at this conclusion?

if it's by curiosity then, which isn't but let's both of us pretend that it is, go and google what you asked me "proof of covid-19" and see for yourself. There is who (world health organization), as well as European organizations like
European Centre for Disease Prevention and Control etc etc

Do you believe a theory without a proof or Do you need a proof to believe a theory?

i told you the place to find the proof, if you still don't wanna even bother to search there then you will believe whatever you want to

I think you will find interesting that WHO doesn't have your interests at heart.