It relies on some chemical knowledge.
The research challenges current understandings of the disease.
The response has been divided.
The device has caused serious debate.
Research is still continuing.
The area needs more research.
The diseases went hand in hand.
The heart can be sensitive to stress.
The venom could be used for good.
He's now vaccinated against COVID-19.
Did you expect it to weigh this much?
Have you been vaccinated yet?
