Epidemic models

Toolset quant_epidemic: 2 tools.

Tool	What it does	Notes
`quant_epidemic_fit`	Fits an SIR or SEIR epidemic model to observed daily counts (one row per calendar day) by least squares: susceptible = population - infected - removed (- exposed).
`quant_epidemic_simulate`	Simulates a compartmental epidemic model from chosen rates and starting counts by integrating its equations daily: SIR, SEIR, SEIRCM (recorded cases, deaths and a quarantine effect) or SEIRCM by age group.

Inputs, limits and outputs are described in Fincept Quant. Full schemas: fincept_describe_tool.