Introduction: In the year 2020 World has seen a calamity known as COVID 19 a perilous respiratory and multi-systemic disease suing millions of deaths all around the Globe. This disease also supposed to have many post COVID complications which range from respiratory illnesses like COPD and asthma to cardiovascular diseases like cardiac arrest leading to be one of the most predominant cause deaths. Performing pulmonary function tests timely may opine about the picture of disease development in the pulmonary tree which may pick up the disease progression early leading to avoidance of critical terminal illness which will lead to a disease free life.