Hendra should be suspected if there is also the proximity of bats, or the presence of human cases of acute respiratory distress syndrome or encephalitis.

In these cases the virus rapidly destroys the lungs' alveoli, where gas transfer occurs, often causing acute respiratory distress syndrome (ARDS), which usually kills in half of all cases.

Objective: to evaluate the effect of ambroxol in preventing and treating neonatal respiratory distress syndrome (NRDS).