When she gave me my shot, she went in & out in one quick motion and my arm started to bleed; She did not go all the way into my arm; Low antibody test result (+3.5) compared to wife (+20); Small amount of vaccine leaking out while taking second dose; This spontaneous case was reported by a consumer and describes the occurrence of ANTIBODY TEST ABNORMAL (Low antibody test result (+3.5) compared to wife (+20)), VACCINATION SITE HAEMORRHAGE (When she gave me my shot, she went in & out in one quick motion and my arm started to bleed), UNDERDOSE (Small amount of vaccine leaking out while taking second dose) and WRONG TECHNIQUE IN DEVICE USAGE PROCESS (She did not go all the way into my arm) in an 80-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. O12M2OA and O12L20AOA) for COVID-19 vaccination.     Concurrent medical conditions included Sleep apnea, Blood pressure high and Lung disorder NOS (breathing capacity 70%.). Concomitant products included AMLODIPINE BESILATE (NORVASC) from 2007 to an unknown date for Blood pressure high, CEFALEXIN (CEPHALEXINE) and DOXYCYCLINE for Cellulitis, ASPIRIN [ACETYLSALICYLIC ACID], TAMSULOSIN HYDROCHLORIDE (FLOMAX RELIEF) from 2018 to an unknown date and ACETYLSALICYLIC ACID (BABY ASPIRIN) from 2010 to an unknown date for an unknown indication.   On 16-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 16-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 13-Feb-2021, the patient experienced UNDERDOSE (Small amount of vaccine leaking out while taking second dose). On 07-May-2021, the patient experienced ANTIBODY TEST ABNORMAL (Low antibody test result (+3.5) compared to wife (+20)). On an unknown date, the patient experienced VACCINATION SITE HAEMORRHAGE (When she gave me my shot, she went in & out in one quick motion and my arm started to bleed) and WRONG TECHNIQUE IN DEVICE USAGE PROCESS (She did not go all the way into my arm). At the time of the report, ANTIBODY TEST ABNORMAL (Low antibody test result (+3.5) compared to wife (+20)), VACCINATION SITE HAEMORRHAGE (When she gave me my shot, she went in & out in one quick motion and my arm started to bleed), UNDERDOSE (Small amount of vaccine leaking out while taking second dose) and WRONG TECHNIQUE IN DEVICE USAGE PROCESS (She did not go all the way into my arm) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 03-May-2021, Antibody test: 3.5 (Low) units not provided. On 06-May-2021, Antibody test: 2.6 (Low) units not provided. On 04-Jun-2021, Antibody test: 1.4 (Low) units not provided.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   No treatment medication was reported.  Action taken with mRNA-1273 with respect to events was not applicable.      Most recent FOLLOW-UP information incorporated above includes: On 10-Jun-2021: Follow-up Received on 10-JUN-2021: Patient demographic was updated; relevant medical history, lab test, concomitant medications and additional events were updated. On 15-Jun-2021: Additional information received on 15-Jun-2021 contain no new information.; Sender's Comments:  MOD21-089039:Wife case