Throughout the pandemic, one of the biggest COVID risks has been sharing a house with someone who is infectious.
Given how contagious COVID is, especially more recent variants, you'd imagine if you lived with someone who has COVID it would be inevitable you'd get infected.a 42.7% chance of catching COVID from a housemate who tests positive to Omicron. That means if someone introduced the Omicron variant to a household of six, you would expect two of the remaining five household members, on average, to become infected.We use the"secondary attack rate" to describe the average number of secondary infections among a group of exposed people, once a virus has been introduced into to a particular setting such as a household.
From early in the pandemic we've also seen"superspreading", where a small number of people are responsible for a large proportion of new COVID cases.