He developed a famous chemical agent.

This adhesive is very strong.

This lime sulphur is very effective in preventing pests and diseases in fruit trees.

He said he had no subjective symptoms.

He is infected with the coronavirus, but he is asymptomatic.

In 1918, the Spanish flu spread all over the world, and many people died.

After taking the cold medicine, I immediately felt better.

I got wet in the rain yesterday and caught a cold.

It's hard to talk with a hoarse voice from a cold.

This bottle is reusable.