However, people with asthma often have neutrophils in their sputum – the sputum may be coloured but is free from infection. Red sputum indicates the presence of blood and may suggest tuberculosis or cancer.
However, people with asthma often have neutrophils in their sputum – the sputum may be coloured but is free from infection. Red sputum indicates the presence of blood and may suggest tuberculosis or cancer.