How Does Our Body Fight Off Infection

4.3

4.1

4.2

4.2

4.1

4.1

4.2

4.3

4

4.7

4.2

4.1

4.3

3.6

4

4.1

4.4

4.2

4.4

3.8

4.3

4.5

4.3

3.9

4.5

4

4.6

4.3

4.1

4.4

4.2

4.6

4.1

4.2