<human>: Is "In the case of Rotavirus, which was responsible for around 6% of diarrheal episodes and 20% of diarrheal disease deaths in the children of developing countries, use of a Rotavirus vaccine in trials in 1985 yielded a slight (2-3%) decrease in total diarrheal disease incidence, while reducing overall mortality by 6-10%." a good answer to the question "What year was the Rotovirus vaccine used?"
OPTIONS:
- yes
- no
<bot>: yes