#### mixed_biscuits

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1) if the destination has lower prevalence than where you currently live, then you know you can go there and do the kind of things you're doing at home without increasing your risk

2) if not, you could compare the destination's prevalence with past prevalence where you live, doing the same

3) estimate the number of people with whom you would have close contact and use the prevalence stat to work out the probability of at least one of them being infected (https://stattrek.com/online-calculator/binomial.aspx); I think the chance of catching the illness from a housemate (ie. a properly close contact, albeit not a partner) is 1/10, so multiply that by 1/10 eg. with 1/1000 prevalence, probability of there being at least one infected in a group of 50 is 5% x 0.1 = 0.5% chance you catch it if you spend a good amount of time around each person.