N7X-21826-49431 · OpenVSafe

Timeline

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

2021-08-13
Dose 1 — Pfizer-BioNTech
2021-08-14
Registered in v-safe
2021-08-14
Health check-in — days 1–6 daily, dose 1
Feeling: Good · Site: Pain · Fatigue or tiredness

Adult check-in
2021-08-15
Health check-in — days 1–6 daily, dose 1
Feeling: Good · None

Adult check-in
2021-08-17
Health check-in — days 1–6 daily, dose 1
Feeling: Good · None

Adult check-in
2021-08-18
Survey response — days 1–6 daily, dose 1
MedDRA: Injection site reaction, Muscle twitching — Feeling: Good

Free text: Muscle twitching at injection site for a few days

MedDRA releases: 2021-09,2024-11 · check-in free text available
2021-08-19
Survey response — days 1–6 daily, dose 1
MedDRA: Muscle twitching — Feeling: Good

Free text: Muscle twitching at injection site

MedDRA releases: 2021-09,2024-11 · check-in free text available
2021-08-22
Health check-in — day 7, dose 1
Feeling: Good · None

Adult check-in

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2021-08-13	Pfizer-BioNTech	No

Free text

Release 9 — days 1–6 daily, dose 1

2021-08-18

Systemic reaction (other): Muscle twitching at injection site for a few days

2021-08-19

Systemic reaction (other): Muscle twitching at injection site

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	Injection site reaction	✓	·	✓
SRO	Muscle twitching	✓	·	✓

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