So if I first have to find the cumulative incidence, am I right to do 49/414 for CI of the exposed with hydroxychloroquine and 58/404 for CI of the exposed given a placebo?

I feel overwhelmed on how to break this down into a 2x2 chart and go from there.

ratory-confirmed Covid-19 or illness compatible with Covid-19 within 14 days, The findings of the study are detailed in the following table (just a heads up: we will learn about p-values and their interpretation later in this course!) Table 2. Outcomes of Hydroxychloroquine Therapy for Postexposure Prophylaxis against Covid-19.# Hydroxychloroquine Placebo Outcome (N =414) (N= 407) P Value number (percent) Confirmed or probable Covid-19 49 (11.8) 58 (14.3) 0.35 Laboratory-confirmed diagnosis 11 (2.7) 9 (2.2) 0.82 Symptoms compatible with Covid-19 48 (11.6) 55 (13.5) 0.46 All new symptoms 57 (13.8) 59 (14.5) 0.84 Any hospitalization 1 (0.2) 1 (0.2) 0.99 Death 0 0 Estimate the risk difference (difference in proportions) of Covid-19 (or suspected Covid-19) infection for subjects randomized to the Hydroxychloroquine arm compared to subjects randomized to the placebo arm, (Hydroxychloroquine - placebo). Ci a. 1.21 (121%) 49 LANERP 54 0. 1183549 - 0.02415124 - 14.3 414 407 0. 1425 0614