Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Assessment of Sars-Cov-2 airborne infection transmission risk in public
  buses   In this study, we apply a novel combination of close proximity and room-scale
risk assessment approaches for people sharing public transport environments to
predict their contagion risk due to SARS-CoV-2 respiratory infection. In
particular, the individual infection risk of susceptible subjects and the
transmissibility of SARS-CoV-2 (expressed through the reproduction number) are
evaluated for two types of buses, differing in terms of exposure time and
crowding index: urban and long-distance buses. Infection risk and reproduction
number are calculated for different scenarios as a function of the ventilation
rates (both measured and estimated according to standards), crowding indexes,
and travel times. The results show that for urban buses, the close proximity
contribution significantly affects the maximum occupancy to maintain a
reproductive number of < 1. In particular, full occupancy of the bus would be
permitted only for an infected subject breathing, whereas for an infected
subject speaking, masking would be required. For long-distance buses, full
occupancy of the bus can be maintained only if specific mitigation solutions
are simultaneously applied. For example, for an infected person speaking for 1
h, appropriate filtration of the recirculated air and simultaneous use of FFP2
masks would permit full occupancy of the bus for a period of almost 8 h.
Otherwise, a high percentage of immunized persons (> 80%) would be needed.

26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol