
133 Molesworth Street
PO Box 5013
Wellington 6140
New Zealand
T +64 4 496 2000
W www.medsafe.govt.nz
11 July 2025
Donna Hiestand
By email: [FYI request #31293 email]
Ref: H2025068545
Tēnā koe Donna
Response to your request for official information
Thank you for your request under the Official Information Act 1982 (the Act) to the Ministry
of Health – Manatū Hauora (the Ministry) on 12 June 2025 for:
“Please provide copies of all Pfizer Vaccine studies and Pfizer Vaccine trials that relate to
the efficacy of the vaccine in reducing the transmission of Covid-19 in the community.”
The clinical trials conducted by Pfizer did not study the effect of any vaccine on transmission of
COVID-19 in the community. As such your request is refused under section 18(g)(i) of the Act as
the information requested is not held by the Ministry and there are no grounds for believing
connected more closely with the functions with another agency subject to the Act.
Information concerning efficacy of the Pfizer (Comirnaty) is publicly available, and can be found
from page 15 onwards of the datasheet at:
www.medsafe.govt.nz/profs/Datasheet/c/comirnaty0.3mlGreyCapinj.pdf
If you wish to discuss any aspect of your request with us, including this decision, please feel free
to contact the OIA Services Team on:
[email address].
Under section 28(3) of the Act, you have the right to ask the Ombudsman to review any decisions
made under this request. The Ombudsman may be contacted by email at:
[email address] or by calling 0800 802 602.
Nāku noa, nā
Chris James
Group Manager
Medsafe