Post Nyiragongo Volcano eruption and the rise of covid-19 in Rwanda: A
Mathematical Model
Abstract
Background: Nyiragongo Volcano erupted, and disturbed preventive
measures taken by Rwanda to curb the pressure of COVID-19 pandemic
transmission. About 232,433 Congolese left their home, and of them, more
than 8000 people crossed the border to Rwanda, which disturbed COVID-19
pandemic preventive measures. Objective: This study sought to find out
whether the rise in Covid-19 in Rwanda was caused by volcanic eruption
in either the exposed area of Rubavu district due to suddenly
unpredicted eruption or spread throughout some neighboring areas via
Kigali due to the earthquakes. Both Mathematical model and a sequential
mathematical preliminary were used. Methods: A sequential mathematical
preliminary of Covid-19 was considered to check how it spreads within a
large number of population. The model diagram was proposed with four
compartmental model. The nonlinear dynamical system was derived from the
model. The model was checked for positivity and boundedness in a system.
The basic reproduction number was computed using the next generation
Matrix. Results: We found that COVID-19 pandemic was positively
invariant in a system. The transmission rate was observed with
〖(R〗_0= 25.51). The transmission rate was great than what was
determined before the eruption of Nyiragongo Volcano (Ro=3). Since R_0=
25.51 the disease is high in the system. As of the study based, the
results finally showed that the rise in Covid-19 in Rwanda was caused by
volcanic eruption. Preventive measures should be reinforced by providing
a place where people should be kept in case of natural disasters and
wars in neighboring countries.