帮我写一篇英语小作文,或者说演讲吧,时间控制在三分钟

1.first,you got to explain what is infectious disease,you can just copy and paste from any dictionaries
2.then you can provide details about what ways that infectious diseases can easily spread from the source to potential groups
3.after this you can list all practical methods in preventing being infected,such as sustain your personal hygiene,maintain enviornment etc.
all these I have given to you are just for reference,hope can help you out!