Richard Okorogheye left his family home in west London on Monday 22nd March he has not been seen since.
Police are making a direct appeal to the missing student for him to get in touch to let officers know he is safe and well.
Officers say their only concern is for his safety and that he is not in trouble with the police.
Met Police Detective Superintendent Danny Gosling has said “People can go missing from home for any of a number of reasons. Our job is not to cast judgment but to work to find them and bring them home safely.
“My message to Richard is clear: Our only concern is your safety. You are not in trouble and have done nothing wrong.
“If you read or hear this message we would ask you to contact us, or someone you trust, to let us know you are safe.”
Police believe that the 19-year-old left his home that he shared with family in the Ladbroke Grove area of west London on the evening of March 22nd.
He then got on a bus and took and then took a 20 mile taxi ride from the W2 area of the capital to a residential street within Loughton, Essex.
He was then spotted on CCTV within the Loughton area walking towards Epping Forest, in the early hours of Tuesday 23 March
The Oxford Brookes student suffers from sickle cell disease and had been struggling to cope with having to shield for the past year and he has not taken any of his daily medication with him.
Checks on his phone have showed it has not been used since he went missing.
Anyone with information is asked to call police on 101 quoting 21MIS008134.