presumably that is a pretty accurate sample of people likely to be infected by me. All the shoppers in the supermarket while I am (and shortly afterwards) are

presumably that is a pretty accurate sample of people likely to be infected by me. All the shoppers in the supermarket while I am (and shortly afterwards) are at risk of picking up the satsumas I fondled too much etc. (to be clear, I'm operating a 'touch means take' policy, but its clear through simple observation that most aren't capable of thinking through the rule (or even following it))