question: OPTIONS:
- yes
- no
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%.
What was the effect of the Rotavirus vaccine?

answer: yes

question: OPTIONS:
- yes
- no
The Aksumites erected a number of large stelae, which served a religious purpose in pre-Christian times.
What purpose did stelae serve?

answer: yes

question: OPTIONS:
- yes
- no
A 2008 cholera epidemic in Guinea-Bissau affected 14,222 people and killed 225.
Where are there reported cholera rates that are lowering?

answer: no

question: OPTIONS:
- yes
- no
National Basketball Association teams play eight preseason games per year.
How many preseason games do NBA teams play?

answer:
yes