Does this sentence conveys the message of awareness of coronavirus and being alert?

It does convey the mentioned thing, but...

It is perhaps better to make cricket allusion clearer as not many people will understand it. Simply because not many people play the game on a regular basis/played it in the past/are familiar with it. A regular person reading the sentence would probably be left with a reaction like: "What? What did you mean?"

So, I would like to suggest something along the lines of

(1) It is time to be defensive - as cricket players do to lower their chances of getting out of the game - rather than aggressive.

So that the sentence is easier to understand for one who's reading it.

P.S. Also, if we want to make the emphasis as obvious as possible, we can add something like "it is not time to forget all the precautions, but..." For example:

(2) It is not the time to forget all the precautions and play aggressively: it is rather the time to play defensively, as cricket players do to lower their chances of getting out of the game.

This way, the sentence absolutely conveys the mentioned thing. But if you have already explained everything before introducing this cricket-sentence, then you can stop on a version (1). No one forbids using metaphors in writing or speech, and we used a metaphor here.