A Study of Avonex to Determine the Effects of Dose Titration on the Incidence of Flu Like Symptoms in Healthy Volunteers

Group 1 subjects will receive weekly Avonex 30 mcg (full dose) IM injections from Week 1 to Week 8. Group 2 subjects will titrate in quarter dose increments every week up to a full dose of Avonex over a 3 week period from Week 1 to Week 3 and then continue on full dose from Week 4 to Week 8. Group 3 subjects will titrate in quarter dose increments every 2 weeks up to a full dose of Avonex over a 6 week period from Week 1 to Week 6 and continue on full dose from Week 7 to Week 8