Answer:
The correct answer is a prevent viruses from dividing.
Step-by-step explanation:
Virus undergo cell division to increase their number after entering the host cell. The increase in cell number produces new virus particles which rupture the cell to infect new cells thus spreading the infection throughout the site of infection in the host body.
One of the most effective way the medicine designed by the scientist to limit the spread of the viruses would be to prevent viruses from dividing because if the virus particles are being stopped from dividing then there will be a high possibility to prevent the spread of viral infection.