Published: 10 November 2021
Archived: 21 August 2024

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COVID-19 Archive

Adverse events following immunisation with COVID-19 vaccines: Safety Report #34 – 23 October 2021

Medsafe advises people NOT to make any decisions about vaccination based on information contained in this report. If you have questions or concerns about receiving a vaccine, please speak to a health care professional.

• What you need to know
• Introduction
• Adverse events following immunisation (AEFI) reported
• Summary of reported deaths
• Observed versus expected analyses
• Adverse events of special interest
• Summary of safety signals
• Definitions
• More information

What you need to know – up to and including 23 October 2021

• The protective benefits of vaccination against COVID-19 far outweigh the potential risks of vaccination.
• The Ministry of Health, Medsafe, the Centre for Adverse Reactions Monitoring and manufacturers continue to closely monitor the safety of COVID-19 vaccines. We’ll respond to any safety issues right away and will inform New Zealanders about any risks that arise in New Zealand.
• For more information about Covid Vaccine Immunisation Programme, please go to Unite against COVID-19 or call healthline +64 800 611 116 to talk to someone about your concerns.
• There were 2,049 non-serious and 69 serious reports this week. There were 3 new notifications of death this week but at the same time additional information provided indicated duplicate reports of death were identified as well so the total number remains the same.
• Up to 23 October 2021 a total of 6,606,065 doses of Comirnaty have been administered and 32,372 AEFIs were reported. This means that more than 6.5 million doses of Comirnaty were administered that did not result in a report of an adverse event. On average for every 10,000 people who are vaccinated 49 people report an AEFI. It is also important to keep in mind that a report can be submitted for any cause and is not necessarily associated with the vaccine.

Introduction

This page provides information on the number of adverse events following immunisation (AEFI) reports received for COVID-19 vaccines.

An AEFI is an untoward medical event which follows immunisation and does not necessarily have a causal relationship with the administration of the vaccine. The adverse event may be an unfavourable or unintended sign, abnormal laboratory finding, symptom or disease.

The national roll-out of COVID-19 vaccines commenced on 20 February 2021. The vaccine currently available in New Zealand is Pfizer-BioNTech (Comirnaty). All medicines can cause side effects, the known side effects for Comirnaty are listed in the data sheet and consumer medicine information.

Suspected AEFI to COVID-19 vaccines are reported to the Centre for Adverse Reactions Monitoring (CARM). The Ministry of Health (through Medsafe) contracts the collection of this information to CARM, based at the University of Otago in Dunedin. Medsafe is closely monitoring the AEFI reported from the use of the COVID-19 vaccine. Find out more about vaccine safety monitoring.

Medsafe and CARM thank everyone who has contributed to the monitoring of COVID-19 vaccines. Please continue to report any adverse events following immunisation.

Adverse events following immunisation (AEFI) reported

The information below includes:

• AEFI reports by prioritised ethnicity and vaccine dose
• AEFI reports by age band and vaccine dose
• the top 10 most frequently reported AEFIs by vaccine dose.
• reported AEFIs by reporter type

AEFI reports received by prioritised ethnicity and vaccine dose, up to and including 23 October 2021

Ethnicitya	Dose 1	Dose 2	Total
Māori	1,566	997	2,563
Pacific Peoples	558	474	1,032
Asian	2,181	1,488	3,669
European/Other	14,469	10,079	24,548
Unknownb	360	194	554
Total	19,134	13,232	32,366c

Notes:

1. The prioritised ethnicity classification system allocates each person to a single ethnic group, based on the ethnic groups they identify with. Where people identify with more than one group, they are assigned in this order of priority: Māori, Pacific Peoples, Asian, and European/Other. So, if a person identifies as being Māori and New Zealand European, the person is counted as Māori. See Ethnicity Data Protocols for further information.
2. There were 554 AEFI reports where the person’s ethnicity was not reported. Counts may change due to receipt of additional information. Ethnicity is not required for an AEFI report to be considered valid. See ‘Valid report’ in the Definitions section below.
3. The total is different from the cumulative total above because it excludes 6 AEFI reports received for infants who did not receive the vaccine.

AEFI reports received by age band and vaccine dose, up to and including 23 October 2021

Age	Dose 1	Dose 2	Total
10 - 19 years	2,131	838	2,969
20 - 29 years	3,780	2,134	5,914
30 - 39 years	4,036	2,689	6,725
40 - 49 years	3,189	2,553	5,742
50 - 59 years	2,828	2,355	5,183
60 - 69 years	1,825	1,513	3,338
70 - 79 years	907	790	1,697
80+ years	413	346	759
Unknowna	25	14	39
Total	19,134	13,232	32,366b

Note:

1. There were 39 AEFI reports where the person’s age was not reported. Counts may change due to receipt of additional information. Age is not required for an AEFI report to be considered valid. See ‘Valid report’ in the Definitions section below.
2. The total is different from the cumulative total above because it excludes 6 AEFI reports received for infants who did not receive the vaccine.

Top 10 most frequently reported AEFIs, dose 1 and dose 2, up to and including 23 October 2021

Download a list of the top 50 most frequently reported AEFIs (any dose)..

Reported AEFIs by reporter type up to and including 23 October 2021

Reporter type	Number of reportsa
Public Patient	11,686
CIR Vaccinator	9,907
Nurse	5,619
Other	3,066
General Practitioner	2,414
Public: On behalf of a patient	968
Pharmacist	222
Not specified	112

1. The total number here differs from the total reported cases elsewhere because a single case can contain multiple reports from different sources.

Please note that one adverse event report, which represents one person, may report on more than one symptom. Reports are sent to CARM if the reporter suspects that the vaccine may have caused the event. This does not necessarily mean that the vaccine did cause the event.

The number of reports can be influenced by how many people are being vaccinated, media attention, the nature of the events (eg, how painful the vaccination was), and other factors which vary over time. Not everyone who has an adverse reaction reports it, and some people may report AEFIs after each vaccination. The information here shows the number of reports not the number of people who experienced an AEFI.

The information is limited by the information provided in the report and may change over time due to quality control procedures and/or receipt of additional information. Non-valid reports are not included in the data.

Summary of reported deaths

Up to and including 23 October 2021, a total of 94 deaths were reported to CARM after the administration of the Comirnaty vaccine. Following medical assessments by CARM and Medsafe it has been determined that:

• 41 of these deaths are unlikely related to the COVID-19 vaccine
• 42 deaths could not be assessed due to insufficient information
• 10 cases are still under investigation.
• 1 death was likely due to vaccine induced myocarditis (awaiting Coroner’s determination)

By chance, some people will experience new illnesses or die from a pre-existing condition shortly after vaccination, especially if they are elderly. Therefore, part of our review process includes comparing natural death rates to observed death rates following vaccination, to determine if there are any specific trends or patterns that might indicate a vaccine safety concern. See below for more information about these observed-versus-expected analyses.

To date, the observed number of deaths reported after vaccination is actually less than the expected number of natural deaths.

Mortalities by age group up to and including 23 October 2021 reported to CARM

Age	Mortalitiesa
10 - 29 years	2
30 - 59 years	16
60 - 79 years	45
80+ years	31

1. Counts may change due to receipt of additional information, for example, identification of duplicate reports.

There were 3 new notifications of death this week but at the same time additional information provided indicated duplicate reports of death were identified as well so the total number remains the same.

Observed-versus-expected analyses

These analyses are updated monthly. The next update is expected in Safety Report #36.

See the Observed-versus-expected analyses in Safety Report #32 for data up to 31 July 2021.

Adverse events of special interest

Adverse events of special interest (AESI) are pre-specified medically significant events that have the potential to be causally associated with the vaccine and must be carefully monitored. AESI can be serious or non-serious and can include:

• Events of interest due to their association with COVID-19 infection.
• Events of interest for vaccines in general (e.g. to the specific vaccine type or adjuvants).

The list of AESIs below takes into consideration the lists of AESIs from expert groups such as the Brighton Collaboration, manufacturers and other regulatory authorities. The AESI list changes based on the evolving safety profile of vaccines. It is important to note that although these adverse events may occur after being vaccinated with a COVID-19 vaccine in New Zealand, they are rare and may not necessarily be related to the vaccine. Medsafe and CARM review the reports to determine whether the vaccine may have played a role in the occurrence of these events.

Adverse events of special interest (AESI) up to and including 23 October 2021

AESI Category	AESI	Totala
Immune system disorders	Guillain-Barré Syndrome	13
	Thrombocytopenia	20
	Thrombosis with thrombocytopenia syndrome (TTS)	0
	Anaphylaxisb	78
Cardiovascular system	Myocardial infarction (heart attack)	36
	Myocarditis/pericarditis	192
Blood and lymphatic system	Thrombosis	37
	Embolism	76
	Deep vein thrombosis (DVT)	67
	Vasculitis	53
	Haemorrhage	93
Hepato-gastrointestinal and renal system	Acute kidney injury	12
	Acute liver injury	<6
	Pancreatitis	<6
Nervous system	Aseptic meningitis	<6
	Encephalitis	<6
	Stroke	69
	Bell's Palsy/facial paralysis	109
	Myelitis/myelitis transverse	<6
Infections and musculoskeletal	Erythema multiforme	7
	Arthritis	36
	Herpes zoster	191
Pregnancy, puerperium and perinatal conditions	Abortion (spontaneous abortion /miscarriage)	15

1. Includes all reports, both serious and non-serious. Counts below 6 are reported as <6 for privacy reasons. Counts may change due to receipt of additional information and subsequent reclassification of cases.
2. Includes reports meeting levels 1-3 of the Brighton Collaboration case definition.

Summary of safety signals

Summary of Medsafe’s investigations into possible safety signals

Safety signal	Outcome
Blood clots	Continue to monitor. See also the Monitoring communication
Appendicitis	Continue to monitor
Myocarditis/pericarditis	Information has been added to Comirnaty data sheet. See also the Alert communication. Medsafe will continue to monitor this closely.
Herpes zoster	Continue to monitor
Bell’s palsy/facial paralysis	Continue to monitor
Menstrual disorder	Continue to monitor
Stroke	Continue to monitor
Tinnitus	Continue to monitor
AEFIs in the elderly	Continue to monitor and updated data sheet
Pancreatitis	Continue to monitor
Glomerular diseases	Continue to monitor
Guillain-Barré Syndrome	Continue to monitor
Thrombocytopenia	Continue to monitor
AEFIs in children	Continue to monitor

Definitions

Adverse event following immunisation (AEFI)

An AEFI is an untoward medical event which follows immunisation and does not necessarily have a causal relationship with the administration of the vaccine. The adverse event may be an unfavourable or unintended sign, abnormal laboratory finding, symptom or disease.

Serious adverse event following immunisation

An AEFI is considered serious if it:

• is a medically important event or reaction
• requires hospitalisation or prolongs an existing hospitalisation
• causes persistent or significant disability or incapacity
• is life threatening
• causes a congenital anomaly/birth defect
• results in death.

It is possible for different people to have experienced the same event but for the report to be serious for one person and non-serious for another person.

Adverse events of special interest (AESI)

An AESI is a pre-specified medically significant event that has the potential to be causally associated with the vaccine product based on past experience, the technology used to make the vaccine or the infection the vaccine is used to protect against. AESIs need to be carefully monitored and any potential association to vaccination confirmed by further analysis and studies.

Safety signal

Information on a new or known adverse event that may be caused by the vaccine and requires further investigation. Safety signals can be detected from a wide range of sources such as CARM reports, clinical studies and scientific literature.

Valid report

There are only four requirements for a valid AEFI report:

1. one patient identifier (eg, name, initials, gender, date of birth, age)
2. suspect medicine(s)
3. suspected reaction(s)
4. reporter details.

These four requirements are the minimum requirements. However, including more information in the report helps Medsafe to investigate the reaction more quickly. Reporting is easiest online.

More information

See the data sheets and consumer medicine information for the expected reactions for approved COVID-19 vaccines.

COVID-19 Vaccine Safety Monitoring Process

View Ministry of Health COVID-19 vaccine data

Latest listing of all cases received

The latest listing of AEFIs received is included in the attached spreadsheet. Medsafe advises patients NOT to make any decisions about vaccination based on information contained here.

Download AEFI-line-listing.xlsm