I gather that you are pointing towards Ebola Virus Disease.
As they depicted in the show, it is endemic in certain countries in Africa.
Especially in Congo and in 2014 there was a huge outbreak in West Africa (Guinea, Sierra Leone, Liberia).
Recently there was an outbreak in North Kivu (Congo) which was the place the lady returned from, in the show.
It can be highly fatal depending on the strain of the virus.
Ebola is essentially a notifiable disease i.e., it has to be reported to concerned authorities; even more so as it is not found within India and can only come here from the outside.