what they need now would be also an adviser pretty known in the whole world

who already made some hardcore deasease public or is a rockstar in the health sector.
For marketing and project launch it would be definitely a very good option!
i also think it would be a great advertising move to rely on a very famous public figure (actor, singer) who publicize the project, really need a lot of visibility for the success of the project...
That would be good when the platform will be launch to the market. But now I think that the good opinion of reputed doctors is more useful.
Right, there are some sports blockchain being advertized by famous soccer players, and that is logical - the people from the corresponding area inspire more confidence.
It does not matter whether they are advertising with a doctor or a celebrity, the important thing is that they attract attention in public.
Of course it is. However, it is much easier to gain audience while a person within the sector will actually advertize it.
I am not sure, of course for whales who wants to invest large amount of money it is good to have a medical person, who is advertising, but for average people a celbrity can be better, because they know them and they get more attention.
Surely there are simple ways to demonstrate your product with people known in a particular region, using terms that bring a positive message to the laity, but it is very possible to find Nationally Recognized Medical Persons in several Countries to play this role