felt like she rode ten miles on a bicycle; "10 days after second dose  I had some weird kind of health thing that came up.; but lost 3 pounds; it got really really bad where mobility was difficult/"it got so bad I couldn't bend down"/"walking up stairs was hard; but hamstring pain is still enough to interfere with daily life; strained muscle; walking up stairs was hard; problems in the thighs with a lot of pain when getting up/moving up and down causing pain in the thighs.; This spontaneous case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (problems in the thighs with a lot of pain when getting up/moving up and down causing pain in the thighs.), FEELING ABNORMAL (felt like she rode ten miles on a bicycle), VACCINATION COMPLICATION ("10 days after second dose  I had some weird kind of health thing that came up.), WEIGHT DECREASED (but lost 3 pounds) and MOBILITY DECREASED (it got really really bad where mobility was difficult/"it got so bad I couldn't bend down"/"walking up stairs was hard) in a 77-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 001B21A and 006M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No medical history was reported.    On 13-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 14-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 24-Mar-2021, the patient experienced PAIN IN EXTREMITY (problems in the thighs with a lot of pain when getting up/moving up and down causing pain in the thighs.). On an unknown date, the patient experienced FEELING ABNORMAL (felt like she rode ten miles on a bicycle), VACCINATION COMPLICATION ("10 days after second dose  I had some weird kind of health thing that came up.), WEIGHT DECREASED (but lost 3 pounds), MOBILITY DECREASED (it got really really bad where mobility was difficult/"it got so bad I couldn't bend down"/"walking up stairs was hard), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (but hamstring pain is still enough to interfere with daily life), MUSCLE STRAIN (strained muscle) and MOBILITY DECREASED (walking up stairs was hard). The patient was treated with PREDNISONE at a dose of 1 UNK; PARACETAMOL (TYLENOL) at an unspecified dose and frequency and IBUPROFEN (ADVIL [IBUPROFEN]) at an unspecified dose and frequency. At the time of the report, PAIN IN EXTREMITY (problems in the thighs with a lot of pain when getting up/moving up and down causing pain in the thighs.), FEELING ABNORMAL (felt like she rode ten miles on a bicycle), VACCINATION COMPLICATION ("10 days after second dose  I had some weird kind of health thing that came up.), WEIGHT DECREASED (but lost 3 pounds), MOBILITY DECREASED (it got really really bad where mobility was difficult/"it got so bad I couldn't bend down"/"walking up stairs was hard), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (but hamstring pain is still enough to interfere with daily life), MUSCLE STRAIN (strained muscle) and MOBILITY DECREASED (walking up stairs was hard) outcome was unknown. Not Provided    DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Platelet morphology: abnormal (abnormal) abnormal.         Action taken with mRNA-1273 (Moderna COVID-19 Vaccine) in response to the events was not applicable. No Concomitant  information was  provided. Treatment also includes Stretching, heat and cold.   Most recent FOLLOW-UP information incorporated above includes: On 08-Jun-2021: Added patient Lab data, Treatment medication vaccine facility. Updated patient demographics, first dose and second dose details, events, events such as  weird kind of health thing, lost 3 pounds, got really bad where mobility was difficult ,hamstring pain is still enough to interfere with daily life ,it got so bad I couldn't bend down walking up stairs was hard, strained muscle.