This statement is true. Providing background information will always help readers follow and understand your essay even if they do not know much about the topic you are writing about.
The summary of this passage would be more clear if it included the detail that there was a dead virus living inside the monkey. This would make it seem far less random that there is a sudden mention of a monkey without context.
The central idea should also include the phrase "and spread throughout the human species" so that the idea of <em>why</em> a virus coming alive would be scary.
Mr Lo is a doctor and he takes care of sick people