when they have to save the world

Ishan and ashvi are best friend.They are pharmacist.In present, they found a virus.It kills a lot of people in bangladesh.But they can't find any medication of it.A month ago,it also start spreading in India, Pakistan, Sri Lanka and in full Asia. Now it spread in the whole world.Like 837,629,69,73 people are dead for the virus.So, Ishan and Ashvi take the challenge to save the world