Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Homeostatic behavioural response to COVID-19 infections returns R to a
  set-point of 1   One clear aspect of behaviour in the COVID-19 pandemic has been people's
focus on, and response to, reported or observed infection numbers in their
community. We describe a simple model of infectious disease spread in a
pandemic situation where people's behaviour is influenced by the current risk
of infection and where this behavioural response acts homeostatically to return
infection risk to a certain preferred level. This model predicts that the
reproduction rate $R$ will be centered around a median value of 1, and that a
related measure of relative change in the number of new infections will follow
the standard Cauchy distribution. Analysis of worldwide COVID-19 data shows
that the estimated reproduction rate has a median of 1, and that this measure
of relative change calculated from reported numbers of new infections closely
follows the standard Cauchy distribution at both an overall and an individual
country level.

5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph