|Record of activities in 2021 at KURCPI
Research Seminar No.207, 18 January 2021
17:00-, The Interdivisional Education and Research Building, 5th Floor
「Risk and Prevention of COVID-19」
(Kagoshima University Graduate School of Medicine and Medical and Dental Sciences)
In islands of Kagoshima Prefecture, several group infections including three COVID-19 big clusters in Yoron and Tokunoshima were observed since July 2020. A total of 205 persons infected by SARS-CoV-2 were reported in the area of islands (as of Dec 26, 2020), accounting for 21.7% of all persons with SARS-CoV-2 in Kagoshima Prefecture. The incidence of COVID-19 in the islands was 2.5 times higher than in the mainland of Kagoshima. The higher incidence in the islands are ascribed to the import of SARS-CoV-2 by travelers and intimate communication among island persons. There were many group infections in eating and drinking establishments and subsequent household infections.
The main infection route of COVID-19 is droplet infection, in which aerosols carrying virus are inhaled at close range. Loud conversation in confined spaces with poor ventilation is high-risk for COVID-19. However, COVID-19 is hardly spread in common social life. In Kagoshima, the number of solitary cases infected by SARS-CoV-2 were 124, while that of groups with links to each other were 83, suggesting that major part of persons with SARS-CoV-2 did not infect any other persons.
Although a variant strain with stronger infectivity requires considerable attention, excessive infection control is detrimental. It is important to develop a targeted infection control measure, such as preventing convivial party in a confined space. In addition, COVID-19 vaccines should be introduced after scientific validation of efficacy and safety in Japanese. To maintain favorable features of islands, feasible infection control with clemency is needed.