Gastroenteritis (stomach flu) is a viral condition that causes diarrhea and vomiting. Viral pharyngitis is a sore throat caused by a virus, and causes throat pain and cold-like symptoms. Tuberculosis usually infects the lungs, causing a bad cough with blood, chest pain, fever, chills, and fatigue.
Second, strong and genuine diplomacy makes economic sanctions effective in modifying regime behavior. Third, strong diplomacy and a potential deal with Iran already yields important benefits, even if the deal is imperfect or ends up failing in the longer term.
International consensus for multilateral sanctions is difficult to come by. That is one of the reasons why China and Russia's approval of UN Security Council Resolutions 1737 and 1747 (and, more recently, the FATF announcement) were so powerful.