What do you consider to be teaming?

Consider the following scenario which I went through (on FFA):

- I saw a confirmed solo player fighting a team of 5

- I did one virus shot at one of the teamers under the following conditions:

1. The virus shot does not cause anybody to immediately die or eat anybody else.
2. The intention was to make the fight slightly more fair. Had I not intervened, the solo player would have had nearly no chance to survive only because of the teaming.
3. The one virus shot was the only way I helped the solo player (even though I could have helped more). I did not help (or get helped) by anybody else through the rest of my game. If me and the solo player came across each other later in the game with nobody around, we would've 1v1'ed instead of team with each other.
4. After the virus shot, I simply watched the fight and the result was the same as if I hadn't virus'ed anyway.

​

I already discussed whether this is teaming or not ad nauseam with u/AC_AChilles in the comment section of this post. But I wanted to see what the rest of you think. Personally, I distinguish between "helping" and "teaming", where teaming is a series of constant helping with the goal of using it as an advantage to fully win against opponents.

Where do you draw the line between what is teaming or not? Is solo players helping other solo players justified? If so, to what extent?