SEAHIR: A Specialized Compartmental Model for COVID-19

Leontitsis, Alexandros; Senok, Abiola; Alsheikh-Ali, Alawi; Nasser, Younus Al; Loney, Tom; Alshamsi, Aamena

doi:10.3390/ijerph18052667

Cited by 46 publications

(37 citation statements)

References 18 publications

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“…Secondly, additional compartments allow more realistic simulation of the dynamics of each disease (Hethcote 2000;Ivorra et al 2020;Baccini et al 2021;Leontitsis et al 2021;Rǎdulescu et al 2020;Giordano et al 2020). One such model is the susceptible-exposed-infective-removed (SEIR) model (Liu 1993;Greenhalgh 1997;Korobeinikov and Maini 2005).…”

Section: Introductionmentioning

confidence: 99%

The Hybrid Incidence Susceptible-Transmissible-Removed Model for Pandemics

Benjamin

2022

Acta Biotheor

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The susceptible-transmissible-removed (STR) model is a deterministic compartment model, based on the susceptible-infected-removed (SIR) prototype. The STR replaces 2 SIR assumptions. SIR assumes that the emigration rate (due to death or recovery) is directly proportional to the infected compartment's size. The STR replaces this assumption with the biologically appropriate assumption that the emigration rate is the same as the immigration rate one infected period ago. This results in a unique delay differential equation epidemic model with the delay equal to the infected period. Hamer's mass action law for epidemiology is modified to resemble its chemistry precursor-the law of mass action. Constructing the model for an isolated population that exists on a surface bounded by the extent of the population's movements permits compartment density to replace compartment size. The STR reduces to a SIR model in a timescale that negates the delay-the transmissible timescale. This establishes that the SIR model applies to an isolated population in the disease's transmissible timescale. Cyclical social interactions will define a rhythmic timescale. It is demonstrated that the geometric mean maps transmissible timescale properties to their rhythmic timescale equivalents. This mapping defines the hybrid incidence (HI). The model validation demonstrates that the HI-STR can be constructed directly from the disease's transmission dynamics. The basic reproduction number ( R 0 ) is an epidemic impact property. The HI-STR model predicts that R 0 ∝ √ n where n is the population density, and is the ratio of time increments in the transmissible-and rhythmic timescales. The model is validated by experimentally verifying the relationship. R 0 's dependence on n is demonstrated for dropletspread SARS in Asian cities, aerosol-spread measles in Europe and non-airborne Ebola in Africa.

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Section: Introductionmentioning

confidence: 99%

The Hybrid Incidence Susceptible-Transmissible-Removed Model for Pandemics

Benjamin

2022

Acta Biotheor

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“…The United Arab Emirates (UAE) was the first from the Gulf Cooperation Council countries to report a COVID-19 case on the 29 January 2020 [5][6][7]. Earlier in January, the emergency response system was activated in the UAE, and health authorities started to work on determining gaps and prioritizing workforce, facilities, and availability of both medical devices and personal protective equipment (PPE) [8].…”

Section: Introductionmentioning

confidence: 99%

Occupational Health of Frontline Healthcare Workers in the United Arab Emirates during the COVID-19 Pandemic: A Snapshot of Summer 2020

Ajab

Balázs

Hammadi

et al. 2021

IJERPH

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The study aim was to understand the availability of personal protective equipment (PPE) and the levels of anxiety, depression, and burnout of healthcare workers (HCWs) in the United Arab Emirates (UAE). This study was an online-based, cross-sectional survey during July and August 2020. Participants were eligible from the entire country, and 1290 agreed to participate. The majority of HCWs were females aged 30–39 years old, working as nurses, and 80% considered PPE to be available. Twelve percent of respondents tested positive for SARS-CoV-2. Half of HCWs considered themselves physically tired (52.2%), reported musculoskeletal pain or discomfort (54.2%), and perceived moderate-to-high levels of burnout on at least one of three burnout domains (52.8%). A quarter of HCWs reported anxiety (26.3%) or depression (28.1%). HCWs reporting not having musculoskeletal pain, having performed physical activity, and higher scores of available PPE reported lower scores of anxiety, depression, and burnout. UAE HCWs experienced more access to PPE and less anxiety, depression, and burnout compared with HCWs in other countries. Study findings can be used by healthcare organizations and policymakers to ensure adequate measures are implemented to maximize the health and wellbeing of HCWs during the current COVID-19 and future pandemics.

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“…One step in that direction, it is to consider mathematical compartmental models to capture the key features of the coronavirus pandemic. Many authors already have applied different mathematical models to study the coronavirus pandemic [ [2] , [3] , [4] , [5] ] but only few have included vaccination [ [6] , [7] , [8] ].…”

Section: Introductionmentioning

confidence: 99%