The US National Institutes of Health states that new research on chimpanzees is suspended, effective immediately, as well as more stringent criteria being implemented for existing experiments, with animal welfare advocates hopeful that this will also pave the way to future legislation protecting the primates from use in entertainment or as pets.

http://www.france24.com/en/20111215-chimpanzee-research-rarely-needed-us-experts
http://www.reuters.com/article/2011/12/15/us-chimpanzees-research-idUSTRE7BE1FU20111215
http://www.trust.org/alertnet/news/us-agrees-to-limit-medical-research-on-chimpanzees/