COVID-19 infected patients tend to infect half of their household members: CDC study

Other studies have found lower household infection rates which the CDC believes might be because they didn't follow-up, patients were isolated in facilities or applied more stringent mask use.

from http://www.firstpost.com/health/covid-19-infected-patients-tend-to-infect-half-of-their-household-members-cdc-study-8974411.html