In the 35 day of the four test is negative, I come from China, but I worry about the Chinese made
machine, the
machine may not be advanced. And do a quick
test before the two are positive, which makes me very worried, I have been thinking about the problem of two positive, I can not forget. Do I need to do the test again? If there is no question why quickly test two times are positive, and now I can not judge whether the test paper is correct or the hospital is correct.