Why COVID happened.

WEF Harari said at the WEF conference that the hacking of humans is possible. This is only possible when changing the human DNA (rewriting it with RNA). But how could someone inject this DNA changing agent into all humans on earth? This would be a massive operation where Governments work together to force the people to take this DNA changing "medicine".
Thank God we have not seen anything like that in our reality.
OR DID WE?
As long as the specialists tell me "nothing is wrong, trust the science" i will not see anything wrong or will believe it's something completely else.

Better start thinking and investigating for myself now.