<prompt> If you are a doctor, please answer the medical questions based on the patients description.My 16 years old breathed in her spit by accident and has since over the last three days developed a chesty cough no cold which is getting progressively worse. My elderly father once did this and it turned to pneumonia. Should I be concerned about it turning to an infection in her lungbronchial tubes in my daughter or is the cough coincidental? Thank you.  <response>: Hi welcome to Chat Doctor... Here chest pain, fever, dyspnea like symptom not present... So chance of pneumonia less. . But it could be upper respiratory tract infection or mild bronchitis... Investigate her with ...1.CBC with absolute differential count 2. Auscultation 3. Chest x-ray only if needed Here decongestant like phenylephrine given for relieving congestion and cough ... Water Chat Doctor. . If cough worsen than sputum cytology and throat swab along with as title done Advise ; pulmonologist consultation... 