How accurate are antiviruses?

Question

Antivirus

There is a suspicious file, the antivirus showed that it is safe. What is the percentage that he made a mistake and there is something there.
Never used antivirus.

Answer 1

Of course, they are inaccurate, the result of their work is a probabilistic thing. Especially considering that new vulnerabilities are constantly being searched for and new viruses are being written, and keeping an anti-virus program up to date is an expensive business.
Based on these probabilities, a reputation is created for each antivirus, and it can also change.
You can independently investigate the reliability of antiviruses, for this you can find virus test packages on the Web. But as a rule, these packages always turn out to be outdated at any given moment, and it shouldn't be otherwise, because in a dispute between armor and a projectile, armor always lags behind.
So when choosing an antivirus (yes, actually, not only it, but anything) rely on reputation.