Of course there will be an 8-K when the 298th event has happened, IMMEDIATELY after the CRO has informed the Company of it. That is material information which may not be withheld from investors!
These are very good questions and I have no authority to answer you, only can make assumptions
One thing is absolutely clear : the 298th event has not been reached so far by any count and that comes from the word of the president of Cel SCI in all his latest interviews. He may have not the obligation to declare it as a material event (8K) _this I am not sure_ but if he states that he is waiting for it, then this means that it has not been counted by Cel SCI.