Table 2.

The A-BBC score system and its components

Severity class	Score	Definition
A	0 point	Normal pleural line and well-ventilated lung with the presence of a maximum of 3 B-lines.
B1	1 point	More than 3 B-lines, their confluence not exceeding more than 50% of the image sector, lack of clear subpleural involvement.
B2	2 points	Confluent B-lines that cover more than 50% of the image sector, lack of clear subpleural lesions.
C	3 points	Presence of consolidation which can be associated with broncho-aerogram.