Table 3

Percentage of types 1, 2, and 3 in lobar pneumonia in the beginning of the 20th century

	Boston City Hospital		The Netherlands		Denmark
Type	1929–30		1935–40		1923
1	34		52		33
2	20		12		27
3	16		10		ND
Total	70		74		>60

Data from references 19, 36, and 37.