South Africa, Namibia, Zimbabwe, Botswana, Lesotho and Eswatini will be added to the red list.
Washington will not take sides in the conflict but will push parties to find a solution to their problem through peaceful means.
Musk, the world's richest man, sold about 930,000 shares.
China and Russia both confirmed they were sending their Afghan envoys to the meeting.
World Health Organisation warns supply shortage threatens to hamper vaccine efforts globally if production does not improve.