Your father's X Ray
has been reviewed by a Pulmonologist as normal.
His ESR is high and he feels weak an feverish, also having cold
, so if he is coughing out sputum you should give sputum analysis for TB, if you are from TB prevalent area this is a priority.
His absolute eosinophil count
was high previously when compared now, but if his cough is dry and low fever and you are from tropical countries like India, it may be due to tropical eosinophilia
For now he can be given antibiotics for cough prescribed by your doctor.
Hope I explained your query.