Actual title:

What could go wrong? Russia scientists 'are trying to extract prehistoric viruses from 50,000-year-old animal carcasses frozen in permafrost'

Answer: They could contaminate the sample and destroy the utility of the samples.
No possible risk to humans, or others.

I've dug deep enough info virus history to realize that the entire "virus" notion is a medical fraud.

Search duck duck go for German high court rules measles virus never proven, or isolated, or whatever. That should produce some articles.

https://duckduckgo.com/?q=german+high+court+rules+measles+virus+doesn%27t+exist&t=brave&ia=web

If you trust your own judgement, then Ignore the insulting "fact checker" propaganda nonsense.

IIRC: A German scientist was researching viruses related to seaweed for something.

He developed an elaborate process of processing a sample's materials to conclusively isolate a virus for analysis.

Having accomplished this, he started looking into what methods were used by physician scientists to isolate and identify human "viruses".
It turned out, they were making wild assumptions, falsifying data, etc.
The medical virologists produced garbage science.

He offered a $100,000 reward to anyone who could prove that measles was a virus.

Someone tried to claim it, and sued.

The German High Court ruled in his favor that they hadn't proven the measles virus to exist.

Covid is a hoax. It's the flu.
The flu virus hasn't been isolated either. The flu shot is a snake oil hoax.

It's probably a cleansing process that's signaled is communicated to others through unidentified mechanisms.