We had planned to delay vaccines until after our daughter was 2 years old and do an alternative schedule when the time came to move forward. Because of a fuss her school was making, in spite of our filling out all appropriate documents, having the pediatricians ok with our plan, and having an exemption form filed, we were made to begin her on vaccines before we were ready. On March 26th, our daughter was given the MMR vaccine. Beginning March 29th, our daughter began to display very violent "tantrums".  With each day they increased in severity, in length, and in frequency. While my child had fits and breakdowns like most children her age. They were not like this, in any fashion. When these would occur, she was not herself - even in her eyes she wasn't the same. Within 3 days of this behavior change, these violent fits would last 45 mins to an hour and a half. Many days would take out 5 hours out of the day because of these events. This was not my daughter. In these events, she would get set off by the slightest thing, and then begin to violently bash her head on anything hard that she could. With severe force. As well, she began biting me if I tried to protect, remove, or restrain her. At one point I had 12 HUGE bruises, 2 of which bled. She would smack herself, or me - pull hair, kick, bite herself, and scream.... There was nothing to do to soothe her or get her out of these events. This was not my daughter before the vaccine. On 2 occasions, she injured herself so badly that I had to take her in to the pediatric office, and have to give them several follow up calls. I wanted her to be checked, I wanted it to all be noted, and I wanted to be sure of protection in case something happened to her. I was also concerned that her injuries were so terrible. Other notable difference is that when not having these violent events, my daughter was not as playful, chatty, interested, or engaged in daily activities as she was before. She would have moments of play or happiness in the day, but the majority of the day was the violent fits and the exhaustion that followed. Overall, her brightness was severely dimmed. Also, my daughter who had a great appetite, suddenly spent evenings only eating some yogurt and a couple bits of fruit and small meals in the day than usual. Lastly, my daughter had several nights of 2-3 night terrors per night where she was reliving or acting out the violent tantrums she had had in the day. She would sometimes open her eyes, but was not awake. She would come out of still sleep to begin bashing her head on pillows or the bed, biting herself or myself, screaming and thrashing about in the bed. When she would finally come too, she would just hold me and cry. April 8th, 14 days after the vaccine was administered and 11 days after these violent events began, my daughter slowly began to take a turn. She began to lessen the fits and frequency. The intensity of them severely decreased. She began to have her appetite return, she began to laugh and play and be sweet and loving.... she would have a small fit or two in the day - but they were under 10mins in length and were more appropriate for a toddler. These were not violent, or severe. These were age appropriate. It was this week that I see that my child is 100% back to herself before the vaccine. Added up from day of shot to day I felt my daughter was clear of all issues, the total is about 2 and a half weeks.