Impact of the constant and time-varied contact rate on COVID-19 pandemic dynamic

Speaker(s)

Tomasz Lipniacki

Affiliation

IPPT PAN

Date

April 1, 2020, 12:15 p.m.

Information about the event

on line: Google Meet

Seminar

Seminar of Biomathematics and Game Theory Group

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We constructed a simple Susceptible-Infected-Infectious-Excluded model of the spread of COVID-19. The model is parametrized only by the average incubation period \tau and two rate parameters: contact rate, r_C, and exclusion rate, r_E. The rates can be manipulated by non-therapeutic interventions and determine the basic reproduction number, R = r_C / r_E, and together with \tau the daily multiplication coefficient \beta of epidemic spread in its early exponential phase. In turn, initial \beta determines the reduction of r_C required to contain epidemic growth. In long-term, we consider scenario based on typical social behaviors in which r_C, first decreases in response to a surge of daily new cases, forcing people to self-isolate, and then slowly increases when people are accepting higher risk. Consequently, initial abrupt epidemic spread is followed by a plateau and slow reversion. This scenario, although economically and socially devastating, will grant time to develop, produce, and distribute vaccine, or at least limit daily cases to manageable number.

***  Link do omawianych na seminarium wyników można znaleźć na stronie PTM: ,,https://www.ptm.org.pl/zawartosc/matematycy-o-koronawirusie-sars-cov-2''. Spotkanie będzie realizowane za pomocą Google Meet. Można połączyć się wklejając do przeglądarki link ,,meet.google.com/dsb-xjix-oxj''.

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