DON’T MISS
IamExpat FairIamExpat Job BoardIamExpat Webinars
Newsletters
EXPAT INFO
CAREER
HOUSING
EDUCATION
LIFESTYLE
EXPAT SERVICES
NEWS & ARTICLES
Home
Expat Info
Dutch news & articles
Dutch coronavirus vaccine is 66 percent effective
Never miss a thing!Sign up for our weekly newsletters with important news stories, expat events and special offers.
Keep me updated with exclusive offers from partner companies
By signing up, you agree that we may process your information in accordance with our privacy policy

Dutch coronavirus vaccine is 66 percent effective

Never miss a thing!Sign up for our weekly newsletters with important news stories, expat events and special offers.
Keep me updated with exclusive offers from partner companies
By signing up, you agree that we may process your information in accordance with our privacy policy
or
follow us for regular updates:



Related Stories

Coronavirus-proof Christmas events in the Netherlands this winterCoronavirus-proof Christmas events in the Netherlands this winter
Travelling during the coronavirus crisis: What are your rights?Travelling during the coronavirus crisis: What are your rights?
What to look out for when travelling during coronavirusWhat to look out for when travelling during coronavirus
July 2021: 13 things changing in the Netherlands from todayJuly 2021: 13 things changing in the Netherlands from today
Financial support for you and your business during coronavirusFinancial support for you and your business during coronavirus
RIVM warns against fake coronavirus vaccination invitationsRIVM warns against fake coronavirus vaccination invitations
Data leak allows anyone to download fake CoronaCheck certificateData leak allows anyone to download fake CoronaCheck certificate
Three-quarters of expats say coronavirus impacted their mental healthThree-quarters of expats say coronavirus impacted their mental health
For expats of all colours, shapes and sizes

Explore
Expat infoCareerHousingEducationLifestyleExpat servicesNews & articles
About us
IamExpat MediaAdvertisePost a jobContact usSitemap
More IamExpat
IamExpat Job BoardIamExpat HousingIamExpat FairsWebinarsNewsletters
Privacy
Terms of usePrivacy policyCookiesAvoiding scams

Never miss a thing!Sign up for expat events, news & offers, delivered once a week.
Keep me updated with exclusive offers from partner companies
By signing up, you agree that we may process your information in accordance with our privacy policy


© 2025 IamExpat Media B.V.
© 2025 IamExpat Media B.V.
Jan 29, 2021
Victoria Séveno
Victoria grew up in Amsterdam, before moving to the UK to study English and Related Literature at the University of York and completing her NCTJ course at the Press Association in London. She has a love for all things movies, animals, and food. Read more

The coronavirus vaccine developed by pharmaceutical company Janssen from Leiden is 66 percent effective, parent company Johnson & Johnson report. 

Leiden coronavirus vaccine 66 percent effective

45.000 people took part in the trials, and Janssen reports that the vaccine was 100 percent effective in preventing hospitalisation and death in coronavirus patients. They also state the vaccine meant 85 percent of those taking part in the trials experienced fewer symptoms if infected with the virus. 28 days after being immunised, 66 percent of those involved in the study were protected from COVID-19.

According to Johnson & Johnson, the vaccine is therefore effective in reducing the risk of moderate or severe illness. However, the Janssen vaccine appears to be less effective against the new South African variant of the virus. The effectiveness of this vaccine is considerably lower than those that have already been approved: both the Moderna and Pfizer/BioNTech vaccines reported around 90 percent efficacy.

Unlike the other vaccines that have already been approved by the European Medicines Agency, the Janssen vaccine is made up of only one dose. The Netherlands has purchased 11,3 million doses of the vaccine.

By Victoria Séveno