Since there is data that shows that early intervention can prevent further destruction of insulin producing beta cells, the patients who will be enrolled in this study will have been diagnosed with Type 1 diabetes within 6 weeks of enrolling and starting therapy. Patients who meet the screening criteria will be randomized at a 2 to 1 ratio to either get weekly subcutaneous injections of efalizumab for 26 weeks versus a placebo injection. The researchers and patients will be blinded to the treatment group assignment. All patients will be followed for two years.