Using your observations of Figures (a) through (b), defend a policy that makes wearing masks mandatory during the early days of an epidemic such as the 1918 flu.

(a)

(b)

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200 150 100 50 60 20 40 Time 80 100 – Infected# Susceptible# --- Recovered# # People 200 - 150 100 R. 50 20 40 Time 60 80 100 Susceptible# -- Infected# Recovered# * People