Select and write the appropriate transition word that complete the ideas of each sentence. choices: both while likewise unlike in contrast

1. Bacteria can live inside or outside the body ______ viruses need a host to survive.
2. ______ in bacterial infection, antibiotics wont work in viral infections.
3. both bacterial and viruses cannot be seen with the naked eye. _______,these microorganisms are capable of causing mild to serious infections.
4.________ to viruses, most bacteria are not harmful. In fact, we have bacteria that helps in food digestion.
5. Medical treatment of _______ bacterial infections and viral infections must be upon the advice of a doctor