Before revision:  All are consistent with the \phi_i model . Clustering increases with total infection count for the full sequences: \phi_i \sim\sqrt{N_i 28-, 14- and 7-day least noisy sequences for several countries are best modelled as sub-Poissonian, suggesting a distinct epidemiological family.
After revision:  All are consistent with the \phi_i model , the 28-, 14- and 7-day least noisy sequences for several countries are best modelled as sub-Poissonian, suggesting a distinct epidemiological family.