I received my second Moderna dose this morning. The card the nurse gave me I will treat as gold. It is the CDC card that proves I received two shots. This will perhaps help me when I travel in the future overseas or to Canada to show to the immigration authorities. For now, I just feel very fatigued and right arm pain which is similar side effects from the first shot. Good luck to all and the shots are all worth it! I will continue to mask up properly.