Instruct: Identify the main category of Medrxiv papers based on the titles and abstracts
Query: COVID-19 risk assessment for the Tokyo Olympic Games ObjectivesTo explore effective prevention and control measures for Coronavirus Disease 2019 (COVID-19) in large international events through simulations of different interventions according to risk assessment.

MethodsWe used random model to calculate the number of initial infected patients. And Poisson distribution was used to determine the number of initial infected patients based on the number of countries involved. Further, to simulate the COVID-19 transmission, the susceptible-exposed-symptomatic-asymptomatic-recovered-hospitalized (SEIARH) model was established based on susceptible-exposed-infectious-recovered (SEIR) mathematical model of epidemic diseases. According to risk assessment indicators produced by different scenarios of the simulated interventions, the risk of COVID-19 transmission in Tokyo Olympic Games was assessed.

ResultsThe large-scale vaccination will effectively control the spread of COVID-19. If the effective rate of vaccine is 100%, and the vaccination rate of athletes reaches 80%, an epidemic prevention barrier can be established.

ConclusionsThe current COVID-19 prevention measures proposed by the Japan Olympic Committee were needed to be enhanced. For the vaccination intervention had the best control effect, a mass vaccination serves was an effective way to control COVID-19.
17
The categories of this paper are: informatics
50
The categories of this paper are: medical
25
The categories of this paper are: improvement
24
The categories of this paper are: oncology
71
The categories of this paper are: ethics
20
The categories of this paper are: psychiatry
1
The categories of this paper are: sports
21
The categories of this paper are: psychology
60
The categories of this paper are: addiction
36
The categories of this paper are: economics
48
The categories of this paper are: critical
55
The categories of this paper are: obstetrics
73
The categories of this paper are: toxicology
14
The categories of this paper are: cardiovascular
46
The categories of this paper are: therapeutics
33
The categories of this paper are: physical