Instruct: Identify the main category of Medrxiv papers based on the titles
Query: Smelling Household-Odorants Effectively Screens for COVID-19
42
The categories of this paper are: occupational
32
The categories of this paper are: rehabilitation
73
The categories of this paper are: toxicology
6
The categories of this paper are: and
21
The categories of this paper are: psychology
4
The categories of this paper are: reproductive
51
The categories of this paper are: education
60
The categories of this paper are: addiction
7
The categories of this paper are: emergency
19
The categories of this paper are: public
67
The categories of this paper are: transplantation
50
The categories of this paper are: medical
47
The categories of this paper are: care
38
The categories of this paper are: hiv
39
The categories of this paper are: rheumatology
29
The categories of this paper are: anesthesia