<Tr> <Th_colspan="2"> Lower respiratory tract infection </Th> </Tr> <Tr> <Td_colspan="2"> Conducting passages </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> pulmonology </Td> </Tr> <Tr> <Th> Frequency </Th> <Td> 291 million (2015) </Td> </Tr>

Signs and symptoms of lower respiratory tract infection