It means “3 drops, 4 times a day!”
1. skin
2. pathogen
3. bacterial, viral
4*. immune response
5*. adaptive or acquired
6. leukocytes
7*. cell-mediated immune response, humoral immune response
8. B-cells, T-cells
9*. the helper T-cell, cytotoxic t-cells
10. antibody
11. nodes
* = not 100% sure
the correct spelling is option A.) Retinopathy the prefix is retin or retino
