Based on the background of national food security,this paper analyzes the current situation of food production in Hubei Province that except food yields,overall production situation is not good. Through the food produ...Based on the background of national food security,this paper analyzes the current situation of food production in Hubei Province that except food yields,overall production situation is not good. Through the food production,storage and circulation,this paper describes the role of food science and technology innovation in food security,and further points out the problems of food science and technology innovation system in Hubei Province,such as disconnection between food science and technology innovation research and food production as well as economic development,backward management system failing to adapt to the needs of agricultural transformation,and low conversion rate of food scientific and technological innovation. Based on this,this paper sets forth the recommendations for food security in Hubei Province.展开更多
Over 40% of the coronavirus disease 2019(COVID-19)COVID-19 patients were asymptomatically infected with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and the immune responses of these asymptomatic individ...Over 40% of the coronavirus disease 2019(COVID-19)COVID-19 patients were asymptomatically infected with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and the immune responses of these asymptomatic individuals is a critical factor for developing the strategy to contain the COVID-19 pandemic.Here,we determined the viral dynamics and antibody responses among 143 asymptomatic individuals identified in a massive screening of more than 5 million people in eight districts of Wuhan in May 2020.Asymptomatic individuals were admitted to the government-designated centralized sites in accordance with policy.The incidence rate of asymptomatic infection is〜2.92/100,000.These individuals had low viral copy numbers(peaked at 315 copies/mL)and short-lived antibody responses with the estimated diminish time of 69 days.The antibody responses in individuals with persistent SARS-CoV-2 infection is much longer with the estimated diminish time of 257 days.These results imply that the immune responses in the asymptomatic individuals are not potent enough for preventing SARS-CoV-2 re-infection,which has recently been reported in recovered COVID-19 patients.This casts doubt on the efficacy of forming"herd-immunity"through natural SARS-CoV-2 infection and urges for the development of safe and effective vaccines.展开更多
基金Supported by Key Humanities and Social Sciences Program of Hubei Provincial Department of Education(15D024)Social Science Fund Project of Yangtze University(2014csy006)Open Fund General Program of Hubei Collaborative Innovation Centre for Grain Industry(MS2015004)
文摘Based on the background of national food security,this paper analyzes the current situation of food production in Hubei Province that except food yields,overall production situation is not good. Through the food production,storage and circulation,this paper describes the role of food science and technology innovation in food security,and further points out the problems of food science and technology innovation system in Hubei Province,such as disconnection between food science and technology innovation research and food production as well as economic development,backward management system failing to adapt to the needs of agricultural transformation,and low conversion rate of food scientific and technological innovation. Based on this,this paper sets forth the recommendations for food security in Hubei Province.
基金supported by the National Science and Technology Major Project(No.2018ZX10101004001005)the National Key R&D Program of China(2018YFA0507201)+3 种基金the National Natural Science Foundation of China(No.31770188,32070179 and 31900144)Fundamental Research Funds for Central Public Welfare Scientific Research Institutes sponsored by National Institute of Metrology,P.R.China(grant no.31-ZYZJ2001 and grant no.AKYYJ2009)the Advanced Customer Cultivation Project of Wuhan National Biosafety Laboratory Chinese Academy of Sciences(No.2018ACCP-MS01)the Key Technology Development Program of Shenzhen(grant no.JSGG20200225153042494).
文摘Over 40% of the coronavirus disease 2019(COVID-19)COVID-19 patients were asymptomatically infected with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and the immune responses of these asymptomatic individuals is a critical factor for developing the strategy to contain the COVID-19 pandemic.Here,we determined the viral dynamics and antibody responses among 143 asymptomatic individuals identified in a massive screening of more than 5 million people in eight districts of Wuhan in May 2020.Asymptomatic individuals were admitted to the government-designated centralized sites in accordance with policy.The incidence rate of asymptomatic infection is〜2.92/100,000.These individuals had low viral copy numbers(peaked at 315 copies/mL)and short-lived antibody responses with the estimated diminish time of 69 days.The antibody responses in individuals with persistent SARS-CoV-2 infection is much longer with the estimated diminish time of 257 days.These results imply that the immune responses in the asymptomatic individuals are not potent enough for preventing SARS-CoV-2 re-infection,which has recently been reported in recovered COVID-19 patients.This casts doubt on the efficacy of forming"herd-immunity"through natural SARS-CoV-2 infection and urges for the development of safe and effective vaccines.
