Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimization strategies of human mobility during the COVID-19 pandemic:
  A review   The impact of the ongoing COVID-19 pandemic is being felt in all spheres of
our lives -- cutting across the boundaries of nation, wealth, religions or
race. From the time of the first detection of infection among the public, the
virus spread though almost all the countries in the world in a short period of
time. With humans as the carrier of the virus, the spreading process
necessarily depends on the their mobility after being infected. Not only in the
primary spreading process, but also in the subsequent spreading of the mutant
variants, human mobility plays a central role in the dynamics. Therefore, on
one hand travel restrictions of varying degree were imposed and are still being
imposed, by various countries both nationally and internationally. On the other
hand, these restrictions have severe fall outs in businesses and livelihood in
general. Therefore, it is an optimization process, exercised on a global scale,
with multiple changing variables. Here we review the techniques and their
effects on optimization or proposed optimizations of human mobility in
different scales, carried out by data driven, machine learning and model
approaches.

21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ