Let's take a look at a timeline:
January 6 2020 : CDC issues Travel Watch Level 1 to Wuhan China
CDC offers to send team to China to assist - offer refused
January 14 2020: WHO states no evidence that Coronavirus is transmitted from human to human.
January 21 2020: 1st Case of Coronavirus in US. Washington State
Jan 25, 2020: US Citizens in Wuhan evacuated via Charter Jets - Put into 14 day quarantine.
Jan 27 2020: CDC / State Dept expands travel alert to Level 3 for all of China
Jan 31 2020 US declares Public Health Emergency
US closes borders to all travel to/from China and to any non US Citizens who may have traveled through China or other high risk areas.
CDC advised Trump that they and private sector had testing kits under control.. He listened to his advisors. Which many slam him for not doing enough of.. guess what, his advisors (CDC) was wrong in this case.
Based upon the timeline, Trump admin had a measured appropriate response to the outbreak as things developed. Remember back in January.. democrats like Goosey were screeching.. "Trump is not doing enough".. Then he closes borders.. then they screech.. "OMG Trump is Over Reacting". Even sleep Joe criticized Trump on Jan 31, calling his closing of borders as Xenophobic and Racist..
Everyone has to remember, Trump could cure the disease tomorrow and people like Goosey will complain.. They just can't help themselves.