How Long Does Vac Sealed Food Stay Fresh I Defrosted A Salmon Fillet (vac. Sealed) By Bringing It Tothe Fridge From The Freezer. I Left It In The Fridg?

I defrosted a salmon fillet (vac. sealed) by bringing it tothe fridge from the freezer. I left it in the fridg? - how long does vac sealed food stay fresh

for two days and today I have just eaten. A family member told him that I did not eat because he had been in the fridge too long. Is it really sick? What could go wrong eating fish?