The aim of this work is to estimate the frequency of small airway disease and/or the bronchial hyperreactivity in follow up of postacute covid survivors.

This is a observational longitudinal study investigating pulmonary sequelae of covid-19.

Study site:

Mansoura university hospital, chest department and post covid outpatient clinic.

Elmahalla chest hospital and outpatients clinic.

Time of study :

Two years from September 2021 to September 2023

Target population:

Adults with confirmed covid 19 who remaining symptomatic after 30 days from the diagnosis.

Sample size The study will include 100 selected cases during period from 2021 to 2023

Patients :

The enrolled patients are adults who survived acute covid-19 and presented for clinical follow up.

Inclusion Criteria:

• Ambulatory adult patients confirmed diagnosis of covid -19 either on typical CT chest basis or PCR and passed period of acute illness (28 days from start of symptoms) but still with clinical symptoms.

Exclusion Criteria:

• Hospitalized or requiring intensive care unit. Known patients with chronic lung diseases Uncontrolled comorbidities

Adults with confirmed covid 19 who remaining symptomatic after 30 days from the diagnosis.