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Published in Daniela Colombini, Enrico Occhipinti, ERGOCHECK for a Preliminary Mapping of Risk at Work, 2020
Daniela Colombini, Enrico Occhipinti
Transmissibility indicates the micro-organism’s ability to spread within the human population by transmission from infected to healthy susceptible individuals. Transmission may occur by: Direct contact between subjects, one of whom is affected by the disease and the other is healthy, with the physical transfer of the micro-organism from one to another (e.g. diseases transmitted from mother to fetus or sexually transmitted infections).Indirect contact, when a vector or carrier acts as an intermediary host is between the two subjects. Vectors include air, water, but also objects, equipment and devices in common use, if contaminated.By means of vectors that are living creatures that carry micro-organisms and disseminate them into the external environment, through inoculation in the host; example include certain species of ticks and mosquitoes.
Review of Effective Mathematical Modelling of Coronavirus Epidemic and Effect of drone Disinfection
Published in S. Prabha, P. Karthikeyan, K. Kamalanand, N. Selvaganesan, Computational Modelling and Imaging for SARS-CoV-2 and COVID-19, 2021
Agnishwar Jayaprakash, R. Nithya, M. Kayalvizhi
To curb the situation, the condition S(0) < γ /β must be satisfied, thus reducing the possibility of infection by increasing the immunity of the community by vaccination and reduce the chance of susceptible community for catching the infection. The transmissibility parameter β can be minimized by keeping the diseased subjects away, by following measures like social distancing, performing frequent cleanising and decontamination. The recovery rate γ can be inflated by treatment of affected subjects in isolation.
Outbreak dynamics of COVID-19 in Europe and the effect of travel restrictions
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2020
Kevin Linka, Mathias Peirlinck, Francisco Sahli Costabal, Ellen Kuhl
The most critical feature of any epidemiology model is the transition from the susceptible to the exposed state. This transition is typically assumed to scale with the size of the susceptible and infectious populations S and I, and with the contact rate β, the inverse of the contact period between two individuals of these populations (Hethcote 2000). The product of the contact rate and the infectious period, is called the basic reproduction number (Delamater et al. 2019). It defines how many individuals are infected by a single one individual in an otherwise uninfected, susceptible population (Dietz 1993). As such, it provides valuable insight into the transmissibility of an infectious agent (Fang et al. 2020). Here we leave this parameter free and identify it independently for each country in the European Union (Peirlinck et al. 2020).
Comparison of the survival of different isolates of SARS-CoV-2 in evaporating aerosols
Published in Aerosol Science and Technology, 2022
P. A. Dabisch, S. P. Wood, B. P. Holland, J. A. Boydston, K. E. Beck, B. Green, J. Biryukov
Throughout the COVID-19 pandemic, numerous variants of SARS-CoV-2 with increased transmissibility have emerged. Potential explanations for the increased transmissibility include increased shedding of virus from infected individuals (Adenaiye et al. 2022; Bolze et al. 2021; Li et al. 2022; Moreira et al. 2021; Teyssou, Delagrèverie, et al. 2021; Teyssou, Soulie, et al. 2021), increased environmental survival during transport from an infected host to an uninfected individual, and/or a decrease in the amount of virus needed to cause infection in a susceptible individual.