4A8-16437-74080 · OpenVSafe

Timeline

Registration Vaccinations Survey responses Call reports Cases without a report Call attempts Call successful Pregnancy survey

2021-01-11
Dose 1 — Pfizer-BioNTech
2021-02-01
Registered in v-safe
2021-02-01
Dose 2 — Pfizer-BioNTech
2021-02-01
Health check-in — day 0, dose 2
Feeling: Good · Headache

Adult check-in
2021-02-02
Survey response — days 1–6 daily, dose 2
MedDRA: Back pain, Chills, Headache, Myalgia, Pain — Feeling: Fair · Site: Pain · Chills, Headache, Joint pains, Muscle or body aches, Fatigue or tiredness · Be unable to work, Be unable to do your normal daily activities

Free text: 13 hours after vaccination, at 2:00 AM, I experienced chills, headache, muscle pain in both arms, but especially in the injection arm. Chills subsided about 4-5 hours later, and arm muscle pain has continued to reduce. Moderate headache remains, as does lower back pain and side pain.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-02-03
Survey response — days 1–6 daily, dose 2
MedDRA: Chills — Feeling: Good · Fever · Headache, Muscle or body aches, Fatigue or tiredness

Free text: After initial chills starting 12 hours after 2nd injection, and continuing for about 4-5 hours, I again had chills starting about another 12 hours later, again lasting several hours (last night). However, this morning by noon, all symptoms have subsided.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-02-04
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-02-05
Health check-in — days 1–6 daily, dose 2
Feeling: Good · Fatigue or tiredness

Adult check-in
2021-02-06
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-02-07
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-02-08
Health check-in — day 7, dose 2
Feeling: Good · None

Adult check-in
2021-02-15
Health check-in — day 14, dose 2
Feeling: Good

Adult check-in
2021-02-22
Health check-in — day 21, dose 2
Feeling: Good

Adult check-in
2021-03-01
Health check-in — day 28, dose 2
Feeling: Good

Adult check-in
2021-03-08
Health check-in — day 35, dose 2
Feeling: Good

Adult check-in
2021-03-15
Health check-in — day 42, dose 2
Feeling: Good

Adult check-in
2021-05-03
Health check-in — 3 months, dose 2
Feeling: Good

Adult check-in
2021-08-02
Health check-in — 6 months, dose 2
Feeling: Good

Adult check-in
2022-02-01
Health check-in — 12 months, dose 2
Feeling: Good

Adult check-in

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2021-01-11	Pfizer-BioNTech
2	2021-02-01	Pfizer-BioNTech

Free text

Release 3 — days 1–6 daily, dose 2

2021-02-02

Systemic reaction (other): 13 hours after vaccination, at 2:00 AM, I experienced chills, headache, muscle pain in both arms, but especially in the injection arm. Chills subsided about 4-5 hours later, and arm muscle pain has continued to reduce. Moderate headache remains, as does lower back pain and side pain.

2021-02-03

Systemic reaction (other): After initial chills starting 12 hours after 2nd injection, and continuing for about 4-5 hours, I again had chills starting about another 12 hours later, again lasting several hours (last night). However, this morning by noon, all symptoms have subsided.

Each entry is dated by the survey it was written in (the CDC re-sent the releases with survey dates in 2025); click a date to see that survey response. The CDC cut some text off at about 250 characters: symptoms in every release, and the other two fields in releases 9-12. Those entries are marked "cut off by CDC".

MedDRA terms by release

Field	Preferred term	2021-09	2023-04	2024-11
SRO	Back pain	✓	✓	✓
SRO	Chills	✓	✓	✓
SRO	Headache	✓	✓	✓
SRO	Myalgia	✓	✓	✓
SRO	Pain	✓	✓	✓

✓ active code · ○ coded but marked inactive · blank = not in that release