Read the text and fill in the missing words. The job of the immune system is to fight these pathogens and get them out of the body. What's so incredible
about the immune system is that it 6
how to fight the infection, so if the pathogen comes back
for round two, the body can beat it off straight away!
1)fall ill
2)remembers
3)protects
4)organism
5)prevent
6)efficient