Bryan is coming to see you for a routine std screening. a complete history reveals that he is sexually active with his partner of 5 years. they have consistently used condoms, however he admits that the condom did break once during intercourse about 6 months ago. he is feeling healthy and considers himself fit. other than a little flu that he had half a year ago, he has no complaints for the past year. his hiv test comes back positive. which stage of the infection is he most likely at