hasn't even been to work the last two weeks/not capable of working; I get out of breath; feel like a tingling, numbness in my chest; feel anxious; feel like a tingling, numbness in my chest/ sometimes the tingling is in my neck or head; chest has been feeling tight/tightness in my chest constantly/all day long it feels tight; weird episode/ like panic attack; felt weird/ Felt off/Since then, every day I have been having the same feeling; thought I was having a heart attack or a stroke/happened in the morning/I feel like I'm about to have a heart attack; This spontaneous case was reported by a consumer and describes the occurrence of CHEST DISCOMFORT (chest has been feeling tight/tightness in my chest constantly/all day long it feels tight), PANIC ATTACK (weird episode/ like panic attack), FEELING ABNORMAL (felt weird/ Felt off/Since then, every day I have been having the same feeling), CARDIAC DISCOMFORT (thought I was having a heart attack or a stroke/happened in the morning/I feel like I'm about to have a heart attack) and LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (hasn't even been to work the last two weeks/not capable of working) in a 26-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 022P21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 19-Aug-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 30-Aug-2021, the patient experienced CHEST DISCOMFORT (chest has been feeling tight/tightness in my chest constantly/all day long it feels tight), PANIC ATTACK (weird episode/ like panic attack), FEELING ABNORMAL (felt weird/ Felt off/Since then, every day I have been having the same feeling) and CARDIAC DISCOMFORT (thought I was having a heart attack or a stroke/happened in the morning/I feel like I'm about to have a heart attack). On an unknown date, the patient experienced LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (hasn't even been to work the last two weeks/not capable of working), DYSPNOEA (I get out of breath), HYPOAESTHESIA (feel like a tingling, numbness in my chest), ANXIETY (feel anxious) and PARAESTHESIA (feel like a tingling, numbness in my chest/ sometimes the tingling is in my neck or head). At the time of the report, CHEST DISCOMFORT (chest has been feeling tight/tightness in my chest constantly/all day long it feels tight), PANIC ATTACK (weird episode/ like panic attack), FEELING ABNORMAL (felt weird/ Felt off/Since then, every day I have been having the same feeling), CARDIAC DISCOMFORT (thought I was having a heart attack or a stroke/happened in the morning/I feel like I'm about to have a heart attack), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (hasn't even been to work the last two weeks/not capable of working), DYSPNOEA (I get out of breath), HYPOAESTHESIA (feel like a tingling, numbness in my chest), ANXIETY (feel anxious) and PARAESTHESIA (feel like a tingling, numbness in my chest/ sometimes the tingling is in my neck or head) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 31-Aug-2021, Blood test: normal (normal) normal. On 31-Aug-2021, X-ray: normal (normal) normal.     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       Patient went to emergency room on 31-AUG-2021 but they did not give him any medication.  Patient rarely took medications.  Concomitant medications were not provided.  Treatment information was not provided.