Haemophilus influenzae ranks fourth among the most frequent pathogens in CAP.
H. influenzae CAP appears to be a condition with a mainly benign outcome.
Respiratory co-morbidity is the main risk factor of H. influenzae CAP.
Overall early clinical response rates were 86%, but only 70% under a macrolide.
Severity of illness and chronic liver disease predicted reduced early clinical response.