This is what R0 measures. So far the estimates are in the 1.5 - 4 range. For comparison, in an unvaccinated population, measles is in the 12-16 range. It's earl

This is what R0 measures. So far the estimates are in the 1.5 - 4 range. For comparison, in an unvaccinated population, measles is in the 12-16 range. It's early stages, though - due to the latency/carrier thing, they're not really sure, and in Wuhan, the R0 number is going to be higher than it would be for worldwide average.