1. How to take part in the study

To take part, you will need to register with IQVIA; this is the company collecting data on behalf of the ONS and the University of Oxford.

To register, call IQVIA on the number included in your letter. You will also need to provide your reference number; you will find this in the top right-hand corner of your letter. Your reference number starts with three letters, for example "COV". The telephone adviser will then be able to book you in for an appointment for a nurse or study health worker to visit your home to complete the study.

Taking part will not affect the medical care you receive, and there is no effect on any regular medication or other prescribed or over-the-counter medicines you might be taking.

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2. Why you should take part in the study

This study will allow scientists to understand who has been infected with the coronavirus (COVID-19), even if they have not realised it at the time. This is particularly important as more people are vaccinated against COVID-19 and we start to monitor how well the vaccines work in the real world. The information we get from people like you taking part in the survey will help scientists and the government work out how to deal with COVID-19. 

Your participation is entirely voluntary, and you may withdraw at any time without providing a reason. Everyone in the household can make a different choice - it is not necessary for everyone to do the same.. Parents or carers may also withdraw their child from the study at any time without giving a reason.

This is your chance to be involved in a unique study that will help scientists work out how many people have already been infected with the coronavirus (COVID-19). If you are still not convinced, you do not have to take part if you do not want to.

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3. How you have been selected for the study

You may have been contacted because you:

  • are currently taking part in the Labour Force Survey; it is also really important to us that you continue to take part in that study

  • have recently taken part in one of our online studies

  • have been randomly selected from a database of addresses

  • have taken part in a survey conducted by NISRA (Northern Ireland Statistical Research Agency)

At the moment, people from over 240,000 homes from across the UK are taking part in the survey.

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4. Who can take part in the study

Anyone in the household aged two years or older can take part in this study. The only exception is adults who are not able to consent for themselves.

It is also fine to take part if you are involved in other research studies.

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5. What happens if you decide to take part

If you or anyone currently resident in your household would like to take part in the study, then we will arrange for a  survey team member to visit your home.

By "currently resident", we mean a person who typically stays overnight in the household address at least four nights out of seven.

A "household" is defined as either:

  • one person living alone; or

  • a group of people (not necessarily related) living at the same address who share cooking facilities and share a living room or sitting room or dining area

Please call IQVIA, the company collecting the data, to book an appointment convenient for you. The reason for sending someone from the  survey team to your home is so that you do not have to travel to take part in the survey. Everyone working for the study has received appropriate training.

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6. Payment for taking part

As a thank you for taking part, everyone, including children, taking part in the study will receive a voucher.

You will be issued a voucher every time you participate in the study.

The amount received for each completed visit is the same for everyone taking part. The amount does not vary if you are invited to give swab samples only or both swab and blood samples.

Everyone who completes the enrolment visit will be offered one £50 voucher, and one £25 voucher for each further visit. From 1 April 2022, the voucher each person receives for each visit will permanently reduce from £25 to £20.

Please note we will never ask for your bank details, the vouchers will only ever be issued by email or in some cases by post.

Receiving your voucher

An email will be sent within 20 working days of each completed appointment with instructions on how to redeem your voucher.

Over the next few weeks, we will be making some changes to the way we issue your voucher codes. The email format will look slightly different, and we will also be sending your voucher link from a new email address: noresponse@vouchers.sodexoengage.com. Please always check your junk or spam folder by searching for emails from this address.

So, what is the benefit of the change? Our new voucher link will mean with one click, you are immediately able to choose your retailer voucher rather than entering a cheque number and validation code on a website. The process for you will be smoother and quicker, improving your redemption journey and delivering a better quality service.

The incentives you receive for taking part do not necessarily follow each visit. So you may receive incentives that contain differing amounts. These amounts will reflect the number of times you have participated. This may also vary for each member of your household - you may not all receive incentives at the same time.

If you have not received your voucher within 20 working days, please email customersupport@sodexoengage.com.

Spending your voucher

The voucher codes will be valid for three months from the date you receive the email. Once redeemed, the voucher for the specific retailer of your choice will be valid for much longer.

Both online and in-store vouchers are currently available for the following retailers, please note these are subject to change at short notice:


  • ASOS
  • Bloom & Wild
  • Boohoo
  • BoohooMAN
  • Burton
  • Buyagift
  • Cineworld
  • Crown Carveries
  • Deliveroo
  • DigiiGifts
  • Dorothy Perkins
  • eLearnGift
  • Eurostar
  • Flightgiftcard
  • FlystayGift
  • Global Experiences
  • Google Play
  • Healthy Minds Club
  • Hotels.com
  • HotelsGift
  • Hussle
  • Inspire Travel
  • Inspire UK Staycation
  • iTunes
  • Jet 2 Holidays by Inspire
  • Just Eat
  • lastminute.com
  • London Theatre Direct
  • Naked Wines
  • NastyGal
  • Not On The High Street
  • Photobox
  • Red Letter Days
  • RentacarGift
  • Royal Caribbean by Inspire
  • Swarovski
  • Ticketmaster
  • Totally Well
  • TripGift
  • TUI by Inspire
  • Uber
  • Uber Eats
  • Virgin
  • Virgin Experience
  • Wingly
  • Zalando


  • All Bar One
  • ASK Italian
  • Bella Italia
  • Browns
  • Café Rouge
  • Caffè Nero
  • Chef & Brewer
  • Clarks
  • Costa
  • Eating Inn
  • Ember Inns
  • Farmhouse Inns
  • Fayre & Square
  • Flaming Grill
  • Foot Locker
  • Global Hotel Card
  • Good Night Inns
  • Great British Pub Card
  • Greene King
  • Halfords
  • Harvester
  • Hotelgift
  • Hungry Horse
  • Iceland
  • Innkeeper's Lodge
  • Las Iguanas
  • Loch Fyne
  • Miller and Carter
  • Morrisons
  • Nando's
  • Nicholsons
  • Old English
  • O'Neill's
  • Pizza Hut Restaurants
  • Primark
  • Sizzling Pubs
  • Stonehouse
  • Tesco
  • The Charity Shop Gift Card
  • The Dining Out Card
  • The Restaurant Card
  • Toby Carvery
  • Vintage Inns
  • Wacky Warehouse
  • Wagamama
  • Zizzi

Both online and in-store

  • adidas
  • Argos
  • Arsenal F.C.
  • ASDA
  • B&Q
  • Blackwells
  • Butlins by Inspire
  • Cote
  • Currys PC World
  • Decathlon
  • Ernest Jones
  • H&M
  • H. Samuel
  • Habitat
  • HomeSense
  • John Lewis & Partners
  • JoJo Maman Bébé
  • Laithwaite's
  • Lavish Spa & Beauty
  • Marks and Spencer
  • National Book Tokens
  • National Trust
  • New Look
  • Nike
  • River Island
  • Sainsbury's
  • Sports Direct
  • Ted Baker
  • The Body Shop
  • The Entertainer
  • The White Company
  • TK Maxx
  • Waitrose

In-store and telephone

  • Harvey Nichols

Redeeming or using your voucher

Vouchers are being sent from a new email address: noresponse@vouchers.sodexoengage.com

If you have not received your voucher following your latest visit. Please check the following email folders:

  • junk
  • spam
  • deleted
  • trash
  • archive

You can also search your inbox using the sender's email address noresponse@vouchers.sodexoengage.com

You can search for the phrase 'You've been awarded a voucher.'

Please refer to the following household or individual how to guides, for a step by step guide on how to redeem your vouchers:

If you would like help redeeming or using the voucher you can also email the voucher supplier directly: customersupport@sodexoengage.com.

Donating your voucher to charity or the NHS

Unfortunately For Good Causes Charity have advised that they can no longer offer the option to purchase eVouchers to donate to charities, which means the eVoucher will no longer be available to purchase. This means there is no current option available to donate to charity. We are sorry for this and are working with our suppliers to identify a replacement option.

Requesting a physical alternative

You can choose to receive a physical gift card instead of an online voucher. Physical vouchers will be posted and fulfilled within 20 working days of your visit date.

If you still wish to receive a physical gift card, please get in touch by emailing Covid-19@ons.gov.uk.

Information on where you can spend a physical gift card is available.

If you still have questions

Please ensure you have read each paragraph in this section.

If your question was not answered, email us at Covid-19@ons.gov.uk. Be sure to include your details (phone number and COV number) so we can support you more efficiently.

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7. Taking part in the study if you have been vaccinated

Everyone in the study can receive a COVID-19 vaccination when they are eligible to do so - if your healthcare provider asks questions about the study, you can show them this letter (64.7 kB pdf) confirming this.

People who have received a COVID-19 vaccination can stay in the study - and it is extremely important that they do so, as long as they are willing. The study will help us monitor how well the vaccine works in stopping the spread of COVID-19.

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8. Coronavirus (COVID-19) symptoms in your household at the time of the study

Survey team members will still visit if anyone in your home is currently experiencing symptoms of COVID-19, self-isolating or shielding. The survey team member will not enter your home, and will pass you the self-swabbing and finger prick kits whilst staying at least two metres away from everyone in the home. They will ask the survey questions from this distance. It is important to visit these people to find out how many are infected or exposed to the virus.

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9. Postponing the study because of coronavirus (COVID-19) symptoms

You can still take part in the future. Please still call IQVIA to let them know, and survey team member can arrange to visit you when you are better.

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10. Withdrawing from the study

Your participation is entirely voluntary. You have the right to withdraw from the study at any time without explanation. This includes after you have arranged an appointment for a survey team member to visit your home and if you have already given a swab from your nose and throat and a blood sample.

If the tests have already been done when you change your mind, we will still use the data from them because they are very important for our study to get a good picture of who has had the coronavirus (COVID-19) across the UK. But if you no longer wish for any leftover blood to be stored, we will destroy it. You can also decide that you do not want us to get any more information about you from the NHS if you leave the study.

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