This either attaches the virus to the host cell or dissolves the membrane letting the virus into the host cell. The viral enzymes(enzymes are again chemical compounds) multiply the viral dna copies and viral protiens. These are new viruses. These new viruses breakout of the cell to infect other cells.
D. A possible answer to a scientific question
Because your body is fighting the sickness and the bacteria.
Answer:
Water and carbon dioxide
The water becomes oxygen and the carbon dioxide gets turned into glucose.