Yes, unconfirmed cases could be 1 billion. Or it could be 0. It could be any number you want it to be.
But since you can't confirm it, it is just a fantasy and not real. That's the great thing about science. It doesn't make things up. It only works with facts. Cold. Countable. Facts.
So what caused the increase in heart attacks in young people? According to science...literally covid.
https://onlinelibrary.wiley.com/doi/10.1002/jmv.28187
Relevant part: Using data from the CDC's National Vital Statistics System, we identified 1 522 669 AMI-associated deaths occurring between 4/1/2012 and 3/31/2022. Accounting for seasonality, we compared age-standardized mortality rate (ASMR) for AMI-associated deaths between prepandemic and pandemic periods, including observed versus predicted ASMR, and examined temporal trends by demographic groups and region. Before the pandemic, AMI-associated mortality rates decreased across all subgroups. These trends reversed during the pandemic, with significant rises seen for the youngest-aged females and males even through the most recent period of the Omicron surge (10/2021–3/2022).
Now, you're probably going to say something like, "but but but vaccine! it bad! it cause death! jab kills! jab kills!"
No. You'd be able to tell. Because we have pre-pandemic tracking. There's a specific rate of attacks happening. Then we see an increase when the pandemic hits. Pandemic arrives, there's an increase in heart attacks.
If it wasn't due to covid, but actually the vaccines, we'd see an increase after the vaccines were introduced.
But that's not what happens. The increase in rate tracks with the waves of infection, not with the rate of inoculation. If it were due to the vaccine, as more people were vaccinated, more attacks. As the level of people who were vaccinated leveled off and dropped (only so many people) then the rate of attacks would track with that decreased rate.
But as new waves of infections happen, the increase in heart attacks track along with it.
So, it's not the vaccines it's covid.
And keep in mind, this is the age group least likely to get vaccinated because they believe it won't happen to them and if it did, it won't be that bad because they're young. So, it's not shocking the demographic with the least amount of vaccination has an increase in heart attacks when infections go up.