Task: Question Answering
Input (English): Question: A 20-year-old girl comes to the clinic with an acute fever, cervical adenopathy and skin rash. According to the patient, 3 weeks ago, she had a sexual relationship that could be at risk for contracting the HIV virus. Does it indicate which of the following answers is true? 
 Options:  <1> A negative HIV-1 / HIV-2 serology performed using the ELISA technique rules out the possibility that the patient has been infected with the HIV virus. <2> The clinical process suffered by the patient does not match that of acute HIV infection. <3> If the patient's ELISA test was positive, it would not be necessary to do anything else for the diagnosis of HIV infection. <4> The ELISA technique has a high sensitivity for the diagnosis of HIV infection, but its specificity is even greater. <5> If the ELISA test to diagnose HIV in the patient was negative, we could determine by the PCR technique the viral load in blood.
Output (English): 5