English Grammar

First sentence doesn't seem to make much sense--what do you think you mean here by "complemented"? Do you mean something like, "there is a new treatment"? Second sentence isn't a sentence--it's a sentence fragment. If there's a new medical treatment, people don't live "calmly", that indicates an emotional state, and you presumable are talking about a physical state, something like "in better health".

or do you mean "is being implemented", which means it is being put to use.

The new invention that can track dengue virus is being complemented. Once it is factored in clinically. People may live more calmly.

Here's what I would do.

The new invention (maybe the word 'process' would be better) that can track dengue virus is being implemented. Once it is factored in clinically, people may feel more secure.

"People may live more calmly" is not wrong; it just feels foreign.

Ya beat me again.

Dearest roger,
the newspaper said someone would complement the new invention. I lost the newspaper. Maybe I read wrong.

Hi Mon,
the 'complemented' meant enhances it.

If complemented is what they intended, I would ask "Complemented by what?"

roger's right; complemented doesn't work there.

Hi all,
thank you.

Hi roger,
can I say 'Roger's explanation complements Jack's explanation perfectly'?

Hi roger,
please ignore my previous reply.
Can I say'Roger's explanation has complemented Jack's explanation clearly'?

You might say Roger's was complemented by Jack's. I would rather use 'confirmed'.