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Timeline

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

2021-04-05
Dose 1 — Pfizer-BioNTech
2021-04-29
Dose 2 — Pfizer-BioNTech
2021-04-30
Registered in v-safe
2021-04-30
Survey response — days 1–6 daily, dose 2
MedDRA: Muscle spasms — Feeling: Fair · Site: Pain · Muscle or body aches

Free text: Lower back muscle cramping

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-01
Health check-in — days 1–6 daily, dose 2
Feeling: Good · Site: Pain · Fever · None

Adult check-in
2021-05-02
Health check-in — days 1–6 daily, dose 2
Feeling: Good · Site: Pain · None

Adult check-in
2021-05-03
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-05-04
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-05-05
Survey response — days 1–6 daily, dose 2
MedDRA: Arthralgia, Nodule, Pain in extremity — Feeling: Good

Free text: My sister-in-law also had the Pfizer shots about 2 months ago. She is just now experiencing a large painful large lump in the inside of her elbow and she has pain in that whole arm, from the shoulder down. Have they seen such delayed reactions before? She is very worried and the P.A. she saw today said maybe it is from knitting too much. This does not make sense to us.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-06
Health check-in — day 7, dose 2
Feeling: Good · None

Adult check-in
2021-05-13
Health check-in — day 14, dose 2
Feeling: Good

Adult check-in
2021-05-20
Health check-in — day 21, dose 2
Feeling: Good

Adult check-in
2021-05-27
Health check-in — day 28, dose 2
Feeling: Good

Adult check-in
2021-06-03
Health check-in — day 35, dose 2
Feeling: Good

Adult check-in
2021-06-10
Health check-in — day 42, dose 2
Feeling: Good

Adult check-in
2021-07-31
Health check-in — 3 months, dose 2
Feeling: Good

Adult check-in

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2021-04-05	Pfizer-BioNTech
2	2021-04-29	Pfizer-BioNTech

Free text

Release 8 — days 1–6 daily, dose 2

2021-04-30

Systemic reaction (other): Lower back muscle cramping

2021-05-05

Systemic reaction (other): My sister-in-law also had the Pfizer shots about 2 months ago. She is just now experiencing a large painful large lump in the inside of her elbow and she has pain in that whole arm, from the shoulder down. Have they seen such delayed reactions before? She is very worried and the P.A. she saw today said maybe it is from knitting too much. This does not make sense to us.

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	Arthralgia	✓	✓	✓
SRO	Muscle spasms	✓	✓	✓
SRO	Nodule	✓	✓	✓
SRO	Pain in extremity	✓	✓	✓

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