Vacuum sealing remains a good idea, so don't toss your gear.
The problem is that some foods support bacteria which CAN grow in a low oxygen environment...
This article gives a good overview of which foods to be careful around AND guidelines on proper methods for vacuum sealing.
http://www.askaprepper.com/vacuum-sealing-hazardous-health/Sadly, not all foods are suitable for vacuum storage
when that is the only method used.Learn about other methods and apply them to the foods which you need in your prepper stock.