This spontaneous case was reported by a consumer and describes the occurrence of INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (Might miss 2nd dose of Moderna vaccine on recommended interval) in a 36-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 003B21A) for COVID-19 vaccination.     Concurrent medical conditions included Chronic bronchitis (It was consistent with his life, any respiratory disease turns into bronchitis.).    On 06-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 06-May-2021, the patient experienced INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (Might miss 2nd dose of Moderna vaccine on recommended interval). The patient was treated with ALBUTEROL [SALBUTAMOL] ongoing since an unknown date for Bronchospasm, at an unspecified dose and frequency; DEXTROMETHORPHAN HYDROBROMIDE, GUAIFENESIN (DEXTROMETHORPHAN HBR AND GUAIFENESIN) for Cough suppression, at an unspecified dose and frequency and NAPROXEN for Bronchial edema, at an unspecified dose and frequency. At the time of the report, INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (Might miss 2nd dose of Moderna vaccine on recommended interval) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 03-May-2021, COVID-19: negative (Negative) Negative.     mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) dosing remained unchanged.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   It was reported that first event was a forced quarantine because a member of his household tested positive for COVID-19 on April 6th, 2021. Two other members of his household subsequently tested positive on April 7th and April 9th respectively. They were in isolation until April 22nd. Patient developed the following symptoms on May 20th, 2021: Nasal congestion, chest congestion, sore throat, productive cough, body aches (no fever). Patient I took a COVID-19 PCR test on May 21st which came back negative. . His symptoms changed to sinus and chest congestion with painful, frequent coughing, and he went to an urgent care clinic on June 2nd, 2021. He again took another COVID-19 test on June 2nd, which came back negative. On July 6th, 2021, he developed a severe sore throat. He received a COVID-19 PCR test on July 7th that came back negative. The symptoms worsened over the course of three days.  This is a case of inappropriate schedule of vaccine administered, therefore causality is not applicable.   This case was linked to MOD21-071978 (E2B Linked Report). This case was linked to MOD-2021-259509 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 13-Jul-2021: Follow up information received on 13 JUL 2021.Patient demographic (Height, weight, age), Current condition (Chronic bronchitis), suspect product details (batch no, action taken), event details (Pneumonia, Sinusitis, Bronchitis, Bronchospasm, Dysphonia, Asthma,Condition aggravated).; Sender's Comments: This is a case of inappropriate schedule of vaccine administered, therefore causality is not applicable. MOD21-071978:crosslinked (case not created on 07-MAY-21)