Britain's blood donor service has been seeking to manage public desire to help after the Manchester pop concert bombing atrocity.
Social media posts wrongly urged would-be donors to visit hospitals and offer blood.
Yesterday NHS Blood and Transplant and local health organisations in Manchester had to issue messages stating there was no need for emergency donors.
The suicide bomb on Monday night has left at least 22 dead and dozens very seriously injured. The youngest known fatality is a child of eight.
Manchester Children's Hospital cleared its trauma beds - moving patients to Liverpool - as it took in 12 very seriously injured children.
NHS Blood and Transplant urged well-wishers to sign up for blood donation and ensure they attended for donation when requested.
The organisation's director of blood donation Mike Stredder said: 'Thank you for thinking of giving blood at this time. We do have all the blood required for hospital patients at the present time.
'If you have an appointment to give blood in the next few days, please do your best to keep it, particularly if you are blood group O negative.'
Disclaimer: The news stories shared on this site are used as a way to inform our members and followers of updates and relevant information happening in Haematology. The BSH does not endorse the content of news items from external sources, and is not in a position to verify the findings, accuracy or the source of any studies mentioned. Any medical or drugs information is provided as an information resource only, and is not to be relied on for any diagnostic or treatment purposes.