Why can malaria spread in a community even when an affected person is taking medication?

Here's why malaria can still spread even when an affected person is taking medication:

Malaria medication primarily targets the parasites within the infected individual to reduce symptoms and parasite load. However, it may not immediately clear all parasites, especially the gametocytes (the stage infectious to mosquitoes). If a mosquito bites an infected person who still has gametocytes in their blood, even while on medication, the mosquito can pick up the parasites and transmit them to other healthy individuals. Additionally, incomplete treatment or drug-resistant strains can allow the infection to persist and spread.