There are no recommendations for medical therapy or auxiliary breathing device at an evidence level to prevent symptoms at subacute phase of novel coronavirus-2019 (COVID-19). As patients are usually symptomatic, they have difficulty in performing their daily activities. A 38-year-old male patient working as a medical secretary was admitted with a complaint of tickle in throat. The reverse transcriptase-polymerase chain reaction test was positive. Under treatment, the patient got worsed. He was

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... hospitalized and respiratory failure was seen. He transferred to the intensive care unit (ICU). In the follow-ups, the patient who was taken to the service from the ICU and then discharged was followed up routinely. Than during the follow-up in the outpatient setting, the patient started to use auxiliary breathing device. At one month, he had no complaint other than dyspnea on exertion, and pulmonary function parameters completely improved. Therefore, this case highlights the importance of using auxiliary breathing device which can yield benefits during the subacute phase of COVID-19.