The discovery of vaccination is/was very important because it helps to save people's lives and make them live longer.
Should I use 'was' or 'is'? What's the difference?
anonymous Should I use 'was' or 'is'? They are both OK. anonymous What's the difference?
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
anonymousShould I use 'was' or 'is'?
They are both OK.
anonymousWhat's the difference?
"Is" calls attention to itself because the reader has to realize that vaccination was developed a while ago. "Was" is plain and therefore better. By the way, vaccination was not discovered. A human being had to think of it and ma