Fever of 103-104; Really weak/Not wanting to do anything; Sleeping; hands started to shake visibly; really cold; Vomited; Chills so bad he put on pajamas; Incoherent; This spontaneous report was received from a consumer on 14FEB2021 regarding a 75-year-old, male patient who received the Moderna COVID-19 (mRNA-1273) vaccine and was experienced high fever, chills, shaking, vomiting, becoming really cold and incoherent.  The patient's medical history provided was reported as chronic heart disease, hypertension, high cholesterol, COPD, Shortness of breath, and confirmed COVID-19 positive test in July of 2020.  Concomitant medications were reported as Symbicort two puffs twice a day, albuterol nebulizer a couple times of day and home oxygen at night.   On 12FEB2021, prior to the onset of the symptoms, the patient received the first of two planned doses of Moderna COVID-19 (mRNA-1273) Vaccine intramuscularly (Lot number: 024M20a).  On 13FEB2021 upon returning from being out, around 1500 his hands started to shake visibly, started moaning, had the chills so bad he put on pajamas, was really cold, vomited, and became incoherent. About 1700 she called 911 because she did not think she could get him in the car. She could tell on his forehead he had a high fever. The paramedics came and took him to the emergency. At some point while in the emergency room, he was transferred to the ICU. Caller says this was probably because of the high fever of 103-104. The nurse told caller they could not get his fever to come down and packed him in ice. The doctor at the hospital contacted the caller to verify his DNR order. The nurse reported to the caller he did vomit again in the hospital. His fever came down on 14feb2021, stayed that night and was released to home on 15feb2021 at about 1330. All vitals were normal. He was not released with medications but told he can use his normal oxygen he uses at night during the day if needed. On 16feb2021 he is really weak, sleeping, not wanting to do anything. Caller says she is not sure if that is from the vaccine or the hospital stay. He told her he got little sleep since they were in and out of his hospital room all night. He has a follow up appointment with his primary care physician on 18feb2021. His second dose is scheduled for 12mar2021. Caller states he is on a list of medications and also has chronic heart disease, hypertension, high cholesterol and COPD that has worsened since July. He takes Symbicort two puffs twice a day, is on albuterol nebulizer a couple times of day. He does have more shortness of breath but that has been since July. He does not have a past experience of the mentioned side effects from other medications or vaccines. No further information was obtained. Caller provides consent for safety to contact".  The action taken for Moderna COVID-19 (mRNA-1273) Vaccine was not provided..   The outcome of the events, "sleepy and really weak, not wanting to do anything" was not reported.  The outcome of the events, "Fever 103-104, hands started to shake visibly, moaning, chills so bad he put on pajamas, really cold, vomited, incoherent, really weak, sleeping, not wanting to do anything, "was reported as resolved on 15FEB2021.; Reporter's Comments: This case concerns a 75 year old, male patient, with history of drug allergies and CHD, HT, high cholesterol, COPD, and COVID-19 positive (July 2021), who experienced a serious unexpected event of pyrexia among others, 2 day after receiving 1st dose of mRNA- 1273 (Lot# 024M20a). Based on the current available information and temporal association between the use of the product and the start date of the event, a causal relationship cannot be excluded. Further information has been requested.