Diseases that may lie in permafrost give reason to worry. These articles are entirely speculative and openly alarmist in nature, I wouldn’t trust them to sway your opinion if I were you.
There’s never been a dormant disease that’s been found and revived from permafrost that we have any reason to believe could infect human, let alone any explanation of how such a disease could make it into the human population just through the thawing of permafrost alone. It’s not just that I don’t think we have reason to worry, I actually think we have plenty of reason not to worry.