Vertaling van "could have been wiped out had something tragic happened during " (Engels → Frans) :

But black history isn't just about saying, “Hey, my ancestors were a part of the No. 2 Construction Battalion in a significant way”, or that the Carty brothers, who are related to me, could have been wiped out had something tragic happened during World War II. All of them, the whole family, a whole generation, could have been wiped out, but they all managed to come back.
Mais l'histoire des Noirs, ce n'est pas seulement de dire « Hé! Mes ancêtres ont joué un rôle important dans le 2 Bataillon de construction », ou « Les frères Carty, qui sont parents avec moi, auraient pu disparaître s'il y avait eu un événement tragique pendant la Seconde Guerre mondiale».

In these cases, tragically, before 1986 that risk benefit worked out in the case of tainted blood to cause infections with hepatitis C. However, the period 1986 to 1990 was the period during which something could have been done and was not done.
Dans les cas tragiques survenus avant 1986, une contamination sanguine a été à l'origine de l'hépatite C. Toutefois, entre 1986 et 1990, des mesures préventives auraient pu être prises et ne l'ont pas été.