All the British-based passengers and crew who were on two flights taken by a British nurse who contracted Ebola have been tracked down, health officials say.
Pauline Cafferkey, who was part of a team of medical volunteers deployed to Africa by the UK Government last month, is receiving specialist treatment in north London.
She was diagnosed with the deadly virus after returning to Glasgow from Heathrow after flying to the UK from Sierra Leone via Casablanca in Morocco.
A Public Health England (PHE) spokeswoman confirmed all British-based passengers and crew members on both flights from Heathrow to Glasgow and from Casablanca to Heathrow have been contacted.
She said they had all been "given advice and reassurance" by health officials.
She added that an additional 31 international passengers on the Casablanca to Heathrow flight were being contacted by international public health authorities.
The Moroccan Ministry of Health has also been tracing passengers aboard the Royal Air Maroc flight from Freetown in Sierra Leone to Casablanca as a precautionary measure.
All passengers on that flight were screened before they left Freetown and cleared to travel, as well as on their arrival in Casablanca, PHE said.
Ms Cafferkey, who works at Blantyre Health Centre in South Lanarkshire, faces a "critical" few days as she is treated with an experimental anti-viral drug and blood from a survivor of the virus, her doctor has said.
Dr Michael Jacobs said she is being treated via a quarantine tent at the Royal Free Hospital with convalescent plasma taken from the blood of a recovered patient and an experimental anti-viral drug which is "not proven to work".
But he revealed the hospital was unable to obtain ZMapp, the drug used to treat fellow British volunteer nurse William Pooley, who recovered, because "there is none in the world at the moment".
Dr Jacobs said Ms Cafferkey was in an early phase of the disease which gave the hospital the "best opportunity to give her treatment".
She has been sitting up and talking, was able to read, eat and drink, and had been in communication with her family, he added.
The 39-year-old, from Glasgow, was initially placed in isolation at a Glasgow hospital early on Monday after feeling feverish, before being transferred to north London on an RAF Hercules plane.
