Sorry to see you join us here @AquaMarina ... there is a Webcast on Triple Negative on Tues, Oct 24th - see if you sign up for it & even submit questions.
Overseas in the UK and USA, they are doing trials with a Triple Neg vaccine, showing promising results - but it is not available in Australia yet - nor likely to be in the near future. :( Maybe you could question them on this!?
https://onlinenetwork.bcna.org.au/discussion/25877/q-a-triple-negative-breast-cancer-on-tuesday-24th-october-from-4-30-6pm-aedt#latesttake care & all the best.