Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strategies for the reuse of N95 and N99 respiratory masks during the
  COVID-19 pandemic   The COVID-19 pandemic presents a strain of unprecedented scale on health
systems around the world. In order to reliably protect medical personnel, and
thus to contain the spread of the pandemic, it is essential to provide N95 or
N99 (European FFP2 or FFP3) respiratory masks (FFRs). Such masks are currently
in extreme shortage: To guarantee their supply sufficiently and for all cases,
it would absolutely necessary to reuse them. In recent years, the scientific
literature has laid out various possibilities to disinfect the FFRs for their
reuse several times. We identify the most promising disinfection methods for
the current critical situation (internationally) and project further methods
and modifications beyond these.

31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio