F9R-33211-55152 · OpenVSafe

Timeline

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

2020-12-18
Dose 1 — Pfizer-BioNTech
2021-01-07
Dose 2 — Pfizer-BioNTech
2021-01-15
Registered in v-safe
2021-01-15
Health check-in — day 7, dose 2
Feeling: Good · None

Adult check-in
2021-01-21
Survey response — day 14, dose 2
MedDRA: Back pain — Feeling: Good

Free text: Worsening back pain. Started day after second dose and still significant. Not clear if related but never a problem in the past.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-01-28
Health check-in — day 21, dose 2
Feeling: Good

Adult check-in
2021-02-04
Health check-in — day 28, dose 2
Feeling: Good

Adult check-in
2021-02-11
Health check-in — day 35, dose 2
Feeling: Good

Adult check-in
2021-02-18
Health check-in — day 42, dose 2
Feeling: Good

Adult check-in
2021-04-10
Health check-in — 3 months, dose 2
Feeling: Good

Adult check-in
2021-07-10
Health check-in — 6 months, dose 2
Feeling: Good

Adult check-in

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2020-12-18	Pfizer-BioNTech
2	2021-01-07	Pfizer-BioNTech

Free text

Release 2 — day 14, dose 2

2021-01-21

Symptoms: Worsening back pain. Started day after second dose and still significant. Not clear if related but never a problem in the past.

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
SD	Back pain	✓	✓	✓

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