Question: What is the missing first step of the following process:  -  The virus has receptors that lock onto a target cell - The virus enters the cell - The virus uses the cell like a factory to make new copies of the virus - The new copies of the virus leave the cell - Infect other cells - The host gets sick as its cells are damaged.
Answer: A virus enters a host body

Question: What is the missing first step of the following process:  -  The virus has receptors that lock onto a target cell - The virus enters the cell - The virus uses the cell like a factory to make new copies of the virus - The new copies of the virus leave the cell - Infect other cells - The host gets sick as its cells are damaged.
Answer: A virus enters a host body

Question: What is the missing first step of the following process:  -  Pack essential items in your suitcase such as underwear/socks - Pack weather appropriate clothing in the suitcase - Always bring a jacket or two - Always bring one semi-formal outfit for a nice dinner - Zip up the bag and be ready to go.
Answer:
Determine the weather where you are going