NB8-19761-62439 · OpenVSafe

Timeline

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

2021-06-18
Registered in v-safe
2021-06-18
Dose 1 — Pfizer-BioNTech
2021-06-19
Survey response — days 1–6 daily, dose 1
MedDRA: Menstruation delayed — Feeling: Fair · Headache, Nausea

Free text: I have not had a period since the vaccine.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-06-20
Survey response — days 1–6 daily, dose 1
MedDRA: Amenorrhoea, Dysmenorrhoea, Office visit — Feeling: Good · Nausea, Diarrhea · Get care from a doctor or other healthcare professional

Free text: Systemic reaction (other): I still have yet to start my period post vaccine. I am currently on Cycle Day 37 when my periods are very regular at 29 days. I am not pregnant. · Healthcare visit (other): Visit to my gynecologist to discuss the lack of period post vaccine.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-06-20
Report sent to call center — days 1–6 daily, dose 1
Get care from a doctor or other healthcare professional

1 call case(s)
2021-06-21
Survey response — days 1–6 daily, dose 1
MedDRA: Menstruation delayed, Pregnancy, Unevaluable event — Feeling: Fair · Nausea · Get care from a doctor or other healthcare professional · Telehealth, virtual health, or email health consultation

Free text: Systemic reaction (other): I am at cycle day 38 and still have started my period. I am usually clockwork 29-31 days. I am not pregnant. · Healthcare visit (other): I will be seeing my gynecologist regarding my missing period.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-06-21
Report sent to call center — days 1–6 daily, dose 1
Get care from a doctor or other healthcare professional

1 call case(s)
2021-06-22
Survey response — days 1–6 daily, dose 1
MedDRA: Menstruation delayed — Feeling: Good

Free text: Finally started my period this cycle. 10 days late.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-06-23
Health check-in — days 1–6 daily, dose 1
Feeling: Good · Headache, Fatigue or tiredness, Nausea

Adult check-in
2021-06-24
Survey response — days 1–6 daily, dose 1
MedDRA: Alopecia — Feeling: Good · Nausea, Diarrhea

Free text: Hair falling out.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-06-28
Call 1 — Left Voicemail
2021-06-28
Call successful
Participant prefers to complete VAERS report online
2021-09-17
Health check-in — 3 months, dose 1
Feeling: Good

Adult check-in

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2021-06-18	Pfizer-BioNTech

Call center

2 call center cases

2 successful

See the call center timeline

Free text

Release 9 — days 1–6 daily, dose 1

2021-06-19

Systemic reaction (other): I have not had a period since the vaccine.

2021-06-20

Systemic reaction (other): I still have yet to start my period post vaccine. I am currently on Cycle Day 37 when my periods are very regular at 29 days. I am not pregnant.

Healthcare visit (other): Visit to my gynecologist to discuss the lack of period post vaccine.

2021-06-21

Systemic reaction (other): I am at cycle day 38 and still have started my period. I am usually clockwork 29-31 days. I am not pregnant.

Healthcare visit (other): I will be seeing my gynecologist regarding my missing period.

2021-06-22

Systemic reaction (other): Finally started my period this cycle. 10 days late.

2021-06-24

Systemic reaction (other): Hair falling out.

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
HCVO	Amenorrhoea	·	·	✓
HCVO	Office visit	✓	✓	✓
HCVO	Unevaluable event	✓	✓	✓
SRO	Alopecia	✓	✓	✓
SRO	Amenorrhoea	·	·	✓
SRO	Dysmenorrhoea	✓	✓	○
SRO	Menstruation delayed	✓	✓	✓
SRO	Pregnancy	✓	✓	✓

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