Fig. 3: Adjustments to the household secondary attack rate estimates.
From: Estimating the household secondary attack rate and serial interval of COVID-19 using social media
A hSAR depicts the monthly household SAR assuming no reluctance to tweet about a household member. hSARb depicts the household SAR adjusted for reluctance. rSAR is an estimate of second infections from outside of the household. Our final estimate of household SAR is hSARbr = hSARb − rSAR. B The monthly values for α1 (the hSAR estimate calculated from the subset of users who tweeted about being infected and subsequently tweeted that a household member was infected) and α2 (the estimate calculated from the subset of users who tweeted about a household member being infected and subsequently tweeted that they were infected) for users with ph > 0 assuming a maximum serial interval of 14 days.
