Please think this through. You're not completing a 6 week grocery trip in the same period of time as a single week grocery trip. You're going to be touching the same amount of items, you're going to be breathing in the grocery store air for the same amount of time.

Even if there was a marginal benefit to yourself it would be still be incredibly selfish to stockpile to the detriment of the vulnerable. The scarcity mentality is very dangerous, please do not perpetuate it.