Vermont is now the fourth state to legalize physician-assisted suicide after Gov. Peter Shumlin signed it into law Monday, CBN News reports. Vermont joins Oregon, Washington and Montana in adopting such a measure, which allows doctors to prescribe a lethal dose of medication to terminally ill patients. Opponents are concerned the law could eventually target the disabled and elderly. "Physician-assisted suicide does not affirm the life or dignity of individuals facing serious illness or death," said Dr. Charmaine Yoest of Americans United for Life. "Instead, it opens the door to abuses and dangers for extremely vulnerable individuals."