Are the current covid jabs effective against Delta?
yes. after two jabs. this is information you could have looked up yourself. why didn't you?
I have looked up the information already, and I have seen what big tech and big media are putting out.
If the current offerings provide adequate protection from Delta, is there any need for an additional vaccine? This question is why your fellow lefties are hesitant to go on the record.
There will likely be a booster needed 6-9 months after your second dose. Akin to an annual flu shot.
This has been relayed for several months now.
Are the current offerings not effective? Why would one need another jab if the current one works?
Again. This possibility has been communicated for several months. The vaccines work so I'm not sure what in this is news for you but the key line in this article is "we don't know".

If the effects wane over time, you'll need a booster. Again, much like a flu shot. Just as the antibodies to actually getting the virus wane over time, so may the vaccine antibodies.
Since it has been proven that you can get the virus again after being infected with it and recovering, I'll take the booster if necessary. And go on about living my life.
Vaccine makers are preparing for a next possible phase of the Covid-19 vaccine rollout: booster doses.
www.cnn.com