Drugmakers say each of the approved vaccines requires two shots given a few weeks apart to be fully effective, and because the government released all of its available doses to try to give as many people as possible their first shot, it's not clear if the second dose will be available to everyone on time.
藥品製造商表示,每個獲準使用的疫苗都需要施打兩劑,並相隔數週施打才會完全發揮藥效,而由於政府已釋放了所有可用的劑量,試圖讓更多人民能盡快施打他們的第一劑,目前還不清楚第二劑疫苗是否能及時提供給所有人。