Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: US faces endemic Covid-19 infections and deaths; ways to stop the
  pandemic   A new epidemic model for Covid-19 has been constructed and simulated for
eight US states. The coefficients for this model, based on seven coupled
differential equations, are carefully evaluated against recorded data on cases
and deaths. These projections reveal that Covid-19 will become endemic,
spreading for more than two years. If stay-at-home orders are relaxed, most
states may experience a secondary peak in 2021. The number of Covid-19 deaths
could have been significantly lower in most states that opened up, if lockdowns
had been maintained. Additionally, our model predicts that decreasing contact
rate by 10%, or increasing testing by approximately 15%, or doubling lockdown
compliance (from the current $\sim$ 15%) will eradicate infections in Texas
within a year. Applied to the entire US, the predictions based on the current
situation indicate about 11 million total infections (including undetected), 8
million cumulative confirmed cases, and 630,000 cumulative deaths by November
1, 2020.

31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph