Fig. 4
From: An overview of tuberculosis outbreaks reported in the years 2011–2020
The number of isolates per each reported outbreak. We retrieved information regarding the size for 477 outbreaks. A Outbreak size for all analyzed studies. Five outbreaks, exceeding 65 isolates are not shown on the graph for better median and interquartile range visibility. The median number of M. tuberculosis isolates involved in an outbreak was 5 (IQR 3–8). B, C, D Outbreak size for population based studies, drug-resistant population based studies and outbreak investigations. Outbreak investigations revealed slightly bigger size outbreaks than the other two types of studies