BBC Homepage
  • Skip to content
  • Accessibility Help
  • Your account
  • Notifications
  • Home
  • News
  • Sport
  • Weather
  • iPlayer
  • Sounds
  • Bitesize
  • CBBC
  • CBeebies
  • Food
  • More menu
More menu
Search BBC
  • Home
  • News
  • Sport
  • Weather
  • iPlayer
  • Sounds
  • Bitesize
  • CBBC
  • CBeebies
  • Food
Close menu
BBC News
Menu
  • Home
  • InDepth
  • Israel-Gaza war
  • War in Ukraine
  • Climate
  • UK
  • World
  • Business
  • Politics
  • Culture
More
  • Tech
  • Science
  • Health
  • Family & Education
  • In Pictures
  • Newsbeat
  • BBC Verify
  • Disability
  • BBC Trending

Tweet when you vomit: It's your duty

  • Published
    13 December 2016
Share page
About sharing
NorovirusImage source, CDC
ByBBC Trending
What's popular and why

If you're suffering with projectile vomiting and watery diarrhoea, reach for your phone and post an update.

No really - while it won't ease your pain, a tweet or two could help researchers track the spread of the winter vomiting bug.

The UK Food Standards Agency has been using social media to track levels of norovirus, a highly contagious illness which spreads via food and through person-to-person contact. The symptoms usually last for one to two days, with the person remaining infectious for a further two days.

If you've ever had it, you know what it means: vomiting, diarrhoea, pain, and the general feeling of having been run over by a car.

line

Listen to More or Less

Hear this story and others from the world of numbers and statistics from the BBC World Service.

line

In 2013, the Foods Standards Agency started looking at new ways to track the virus. They analysed Google searches but found that social media was a better source of data. "It's more about the immediacy… what's happening in their lives right now," says Dr Sian Thomas.

On the other hand, "if you're in hospital or a nursing home and you're sick, then they might take a sample and send it to a laboratory for analysis," she says.

The FSA compared this official sample data with the volume of relevant tweets and concluded that "there's a really good correlation between the number of mentions on Twitter of 'sick' and a range of search terms, with the incidents of illness as defined by laboratory reports."

"Our current estimate is that between 70-80% of the time, we are able to accurately predict an increase the next week."

line

Follow BBC Trending on Facebook

Join the conversation on this and other stories here, external.

line

The model searches for Tweets containing words and phrases relating to norovirus symptoms. "There's a whole range of things", says Dr Thomas. "It's mostly about the impact that being sick has on other things that are going on around them."

Tweet - Kids and co-workers coming down with episodes of vomit and diarrhoeaImage source, @quassihollic/Twitter
my whole family is sick at home, great isn't it?Image source, @haley_juli/Twitter
Was up all night vomiting!Image source, @sajarina/Twitter

Researchers exclude tweets which include references to pregnancy, anxiety, and alcohol. According to Dr Thomas, the task of filtering "gets more tricky towards Christmas."

I'm so hungover today, I feel so sickImage source, @coco_fontaine/Twitter
Tweet - Anxious vomiting is not the oneImage source, @olivia_evenden/Twitter

By tracking the volume of symptom-related tweets, the Food Standards Agency can try to intervene before a national outbreak.

"In order to have the biggest impact, it's better to roll out that intervention when the numbers of cases of norovirus are going up… when we've got three consecutive weeks of a predicted increase," says Dr Thomas.

If the team predict a national outbreak, they plan to run a digital campaign explaining how to look after yourself.

"The intervention is really quite basic," she notes. "It's about washing your hands, it's about looking after yourself, and not coming in to contact with other people while you're sick."

Norovirus can be dangerous for children or the elderly. Fortunately for healthy adults though, the illness is usually a minor, if messy, inconvenience.

Blog by Elizabeth Cassin, More or Less, BBC World Service

Next story: Home for Christmas thanks to a stranger's air miles

Sarah Jesseman hasn't spent the holidays with her family since graduating from university three years ago. But that will change this yearImage source, Imafermatasoholdme/imgur

Dreams of spending Christmas at home with family will come true for at least ten people who'd thought they were going to be spending the festive season apart, all thanks to a businessman's enterprising scheme.READ MORE

You can follow BBC Trending on Twitter @BBCtrending, external, and find us on Facebook, external. All our stories are at bbc.com/trending.

More on this story

  • Vomiting bug 'at high level this winter'

    • Published
      9 December 2016
    Norovirus

Top stories

  • Live. 

    Israeli cabinet to discuss Gaza plan that would bring ceasefire and hostage release

    • 10534 viewing11k viewing
  • Jeremy Bowen: There's now a realistic chance of ending the war - but it's not over yet

    • Published
      3 hours ago
  • What we know about the Gaza ceasefire deal

    • Published
      3 hours ago

More to explore

  • Stars, secrets and slip-ups: Celebrity Traitors is off to a cracking start

    Alan Carr on the Celebrity Traitors, sitting in an armchair and smiling
  • Young children taking knives to school, BBC finds

    Graphic: Knives in foreground, in background children sitting at school desks.
  • 'It was like a movie' - How immigration raid on Chicago apartments unfolded

    Image of law enforcement officer pointing a gun, with sparks in the background
  • Inside the room where Nobel Peace Prize is decided – but will Trump get his wish?

    Members of the Nobel Peace Prize committee and secretary sit around a table in the room where they make their decision
  • 'I missed a £100 council tax bill while in hospital – the debt ballooned to £6k'

    A young man, with long dark brown hair and a brown beard and moustache , sits next to a hospital bed. He has a bandage on his neck.
  • My eating disorder made me good at lying, says Victoria Beckham

    Victoria Beckham waves while wearing a white suit with other people in the background as she attends the Victoria Beckham premiere in London on Wednesday.
  • The battle for Scotland's flag: Why the right has adopted the saltire

    A man raises his fist while standing in front of a group of people waving flags, including saltires and a union flag.
  • Would leaving the ECHR really 'stop the boats'?

    Montage image showing Nigel Farage, Kemi Badenoch and Sir Keir Starmer
  • The Upbeat newsletter: Start your week on a high with uplifting stories delivered to your inbox

    A graphic of a wave in the colours of yellow, amber and orange against a pink sky
loading elsewhere stories

Most read

  1. 1

    Man who appealed Pelicot rape conviction handed longer jail term

  2. 2

    Former Radio 1 DJ Tim Westwood charged with four counts of rape

  3. 3

    Tesla investigated over self-driving cars on wrong side of road

  4. 4

    My eating disorder made me good at lying, says Victoria Beckham

  5. 5

    Alleged McCann stalker 'sent creepy messages'

  6. 6

    'I missed a £100 council tax bill while in hospital – the debt ballooned to £6k'

  7. 7

    Man re-arrested over Manchester synagogue attack

  8. 8

    Water bills to rise further for millions after appeal

  9. 9

    Five ways abolishing stamp duty could change the housing market

  10. 10

    Met officers face fast-track hearings after Panorama investigation

BBC News Services

  • On your mobile
  • On smart speakers
  • Get news alerts
  • Contact BBC News

The Celebrity Traitors

  • An all-star cast enters the ultimate game of deceit

    • Attribution
      iPlayer

    Added to Watchlist
    The Celebrity Traitors has been added to your iPlayer Watchlist.
    The Celebrity Traitors
  • All the betrayal and drama unpacked

    • Attribution
      iPlayer

    Added to Watchlist
    The Celebrity Traitors: Uncloaked has been added to your iPlayer Watchlist.
    The Celebrity Traitors: Uncloaked
  • Meet the Celebrity Traitors as the mind games begin

    • Attribution
      iPlayer

    Added to Watchlist
    The Celebrity Traitors has been added to your iPlayer Watchlist.
    The Celebrity Traitors
  • A treacherously good version of a pop classic

    • Attribution
      iPlayer

    Added to Watchlist
    BBC Proms has been added to your iPlayer Watchlist.
    BBC Proms 2025: Britney Spears
  • Home
  • News
  • Sport
  • Weather
  • iPlayer
  • Sounds
  • Bitesize
  • CBBC
  • CBeebies
  • Food
  • Terms of Use
  • About the BBC
  • Privacy Policy
  • Cookies
  • Accessibility Help
  • Parental Guidance
  • Contact the BBC
  • Make an editorial complaint
  • BBC emails for you

Copyright © 2025 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.