So I want to bring into light that some events that occurred in the manga didn't happen in the anime or was simply changed:
1. Taromaru (in general)"
In the manga, Taromaru was (per say) 'kicked out' of the club after being infected by Megu-Nee. However in the anime, he was seemingly cured after Yuuri administers the same vaccine that was given to Kurumi and they both are 'cured'. However the poor dog was simply too weak and dies in Miki's lap. Also, Taromaru was discovered by Yuki in the manga but in the anime, he was originally with Miki and Kei trapped inside the mall.
2. The Helicopter Pilot Scene/Event
In the manga, a helicopter was crashed by an infected pilot whom was trying to administer the antidote on himself but broke the syringe. The crash eventually leads to Yuuri finding a map that leads them to Isidore University. However in the anime, after Kurumi was 'cured' and Taromaru was buried. Yuuri finds a map in the emergency manual and therefore they had their graduation.
That's all I've seen so far, if they are any events that I've might missed. Please share it with us on the comments below.