Ah hell, zombies aren't real!

You plan to leg it away from a bio warfare attack, why the anti rad pills?

Biologicals do not always attack via the airway, yet you have no NBC suit.

Military NBC suits have a usable life of a month once removed from their packaging, less if contaminated. The same for respirator filters. That is a lorry load not a rucksack.

Take a good book with you, or several dozen.