Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Optimal Control Model of the transmission dynamics of COVID-19 in
  Ghana   The emergence of COVID-19 has led to the loss of lives of over 1300 people in
Ghana. In this paper, we propose a Susceptible, Exposed, Asymptomatic,
Symptomatic, Vaccinated, Recovered (SEAQVR) model to study the transmission
dynamics of COVID-19 in Ghana. We also introduce a compartment for the COVID-19
related deaths and we validate the model using COVID-19 data of Ghana. The
steady states and the stability analyses are examined. The disease free
equilibrium is both locally and globally stable. The reproductive number of the
model has been computed. The numerical simulation prediction is consistent with
COVID-19 situation in Ghana. Optimal controls were incorporated into the model
to determine the effectiveness of two preventive control measures which were
the use of a nose mask and vaccination. Both measures were very effective in
curbing the spread of the disease. However, the use of the mask increases
susceptibility, unlike vaccination.

22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol