Yes, you could still have food in your lungs
after 30 days that might or might not be the cause of your “weird-sounding
, deep voice”. Food, especially nuts, can linger for a long time and result in irritation or even infection. In addition even after food is coughed-up or removed by bronchoscopy in-hospital, cough and wheeze may persist for months, secondary to foreign-body-induced chemical irritation.
Substances can continue to be released, from the aspirated food, indefinitely.