Black vomit and Infectious disease

Black vomit noun - Caused by a flavivirus transmitted by a mosquito.

Infectious disease and black vomit are semantically related. In some cases you can use "Infectious disease" instead a noun phrase "Black vomit".

Infectious disease noun - A disease transmitted only by a specific kind of contact.

Black vomit and infectious disease are semantically related. Sometimes you can replace phrase "Black vomit" with "Infectious disease", this phrases are similar.