Epidemiologic parameter	Containment interventions	Responsibility	R0 parameter affected*
Undocumented transmission (α)	Mass testing to identify new clusters followed by: Government-initiated contact tracing, and isolation of cases and quarantine of contacts Individual-initiated “contact tracing”, and self-isolation of cases and self-quarantine of contacts Targeted surveillance testing of diverse social networks to potentially identify clusters of infection	Government-facilitated, with mass individual participation	Duration of infectiousness (D)
Duration of asymptomatic transmission (β)	Contact tracing followed by testing then isolation of cases and quarantine of contacts	Government, with strong individual and collective commitment	Duration of infectiousness (D)
Time from onset of symptoms until isolation (γ)	Public awareness about symptoms and course of action at onset of symptoms Immediate self-imposed isolation	Individual, with government-initiated awareness	Duration of infectiousness (D)
Frequency of social contacts (δ)	Social distancing through: Limiting circle of social contacts Reducing number of social contacts per day Avoidance of mass gatherings and crowded settings	Individual and collective, with facilitation from government action	Contact rate (c)
Distance between individuals in a social contact (μ)	Physical distancing through keeping a minimum of 1-2 meters distance between individuals in every contact	Individual and collective	Transmission probability per contact (p)
Frequency of potentially infectious exposures (θ)	Prevention of respiratory droplet transmission (covering sneezes/coughs) Hand and face washing/stopping face touching	Individual and collective	Contact rate (c) and transmission probability per contact (p)