interchange of vaccine products; Itchy skin; COVID-19; Lost 8 pound weight; Lost 20 pound weight; This spontaneous case was reported by a consumer and describes the occurrence of WEIGHT DECREASED (Lost 20 pound weight), PRURITUS (Itchy skin), WEIGHT DECREASED (Lost 8 pound weight), COVID-19 (COVID-19) and INTERCHANGE OF VACCINE PRODUCTS (interchange of vaccine products) in an 84-year-old male patient who received mRNA-1273 (Spikevax) for COVID-19 vaccination.    Co-suspect products included non-company products ADALIMUMAB (HUMIRA) for Rheumatoid arthritis and TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) for COVID-19 vaccination.    No Medical History information was reported.   On an unknown date, the patient received dose of mRNA-1273 (Spikevax) (Intramuscular) 1 dosage form, ADALIMUMAB (HUMIRA) (Subcutaneous) UNK, Citrate Free and dose of TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) (Intramuscular) 1 dosage form. In 2020, the patient experienced WEIGHT DECREASED (Lost 20 pound weight). In 2021, the patient experienced WEIGHT DECREASED (Lost 8 pound weight). In October 2021, the patient experienced PRURITUS (Itchy skin) and COVID-19 (COVID-19). On an unknown date, the patient experienced INTERCHANGE OF VACCINE PRODUCTS (interchange of vaccine products). At the time of the report, WEIGHT DECREASED (Lost 20 pound weight), PRURITUS (Itchy skin) and WEIGHT DECREASED (Lost 8 pound weight) had not resolved and COVID-19 (COVID-19) and INTERCHANGE OF VACCINE PRODUCTS (interchange of vaccine products) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In 2020, Weight: lost 20 pounds lost 20 pounds. In 2021, Weight: lost 8 pounds lost 8 pounds. On an unknown date, Weight: gained 5 pounds back gained 5 pounds back.     The action taken with mRNA-1273 (Spikevax) (Intramuscular) was unknown.       No concomitant medications were reported. Treatment information was not provided. It was unknown if patient was enrolled in a COVID-19 Vaccine Trial.  Primary reporter did not have the lot number information, because the packaging was discarded.  Causality for HUMIRA (ADALIMUMAB): The reporter's causality for the event (s) of LOST 20 POUNDS, LOST 8 POUNDS and ITCHY  SKIN AFTER COVID AND VACCINATION unknown onset with HUMIRA (ADALIMUMAB) was no reasonable possibility. The reporter's causality for event (s) of ITCHY SKIN AFTER COVID AND VACCINATION onset in Oct-2021 was not provided. COMPANY COMMENT: This is an spontaneous case concerning a 84-years-old male patient with medical history of non-company products as ADALIMUMAB (HUMIRA) for Rheumatoid arthritis and TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) for COVID-19 vaccination who experienced the unexpected events of COVID-19 (AESI), WEIGHT DECREASED (1st episode), WEIGHT DECREASED (2nd. episode), PRURITUS and INTERCHANGE OF VACCINE PRODUCTS unknown days after receiving a dose of mRNA-1273 vaccine. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.; Sender's Comments: COMPANY COMMENT: This is an spontaneous case concerning a 84-years-old male patient with medical history of non-company products as ADALIMUMAB (HUMIRA) for Rheumatoid arthritis and TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) for COVID-19 vaccination who experienced the unexpected events of COVID-19 (AESI), WEIGHT DECREASED (1st episode), WEIGHT DECREASED (2nd. episode), PRURITUS and INTERCHANGE OF VACCINE PRODUCTS unknown days after receiving a dose of mRNA-1273 vaccine. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.