Among the well-known diseases, measles and chickenpox are two of the most infectious. But how does their contagiousness compare to the Delta variant of SARS-CoV-2 that is now causing the majority of ...

The reproduction number 𝑅 is a key indicator used to monitor the dynamics of Covid-19 and to assess the effects of infection control strategies that frequently have high social and economic costs.

Scientists say there is no evidence that the BA.5 version of the Omicron coronavirus variant is more transmissible than measles, or that it has a basic reproduction number, or "R-naught" (R0), of 18.6 ...