Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Clinical Trial of Primary Prophylaxis Against Joint Disease in Children With Severe Hemophilia
Brief Summary: This study examines the progression of joint disease in children with hemophilia assigned to either standard treatment or enhanced therapy.


Options:
A: Inclusion Criteria:

* Diagnosed with hemophilia A
* factor level less than 2%

Exclusion Criteria:

* More than 2 bleeds into the same joint
B: Inclusion Criteria:

* The subject is male and is 18 to 65 years of age at the time of screening
* The subject has severe hemophilia A (factor VIII level \< 1%)
* The subject was previously treated with plasma-derived factor VIII (FVIII) concentrates or recombinant FVIII for at least 150 exposure days (EDs)

Exclusion Criteria:

* The subject has a detectable FVIII inhibitor at screening, with a titer \>= 0.6 BU
* The subject has a documented history of FVIII inhibitors with a titer \>= 0.4 BU at any time prior to screening
* The subject has a known hypersensitivity towards mouse or hamster proteins or to polyethylene glycol (PEG)
C: Inclusion Criteria:

* Males ≥ 18 years of age with established severe HB (FIX:C\<1u/dl),
* Treated/exposed to FIX products (e.g., concentrates or fresh frozen plasma) for at least 10 years or 50 exposure days.
* A minimum of an average of 3 bleeding episodes per year requiring FIX infusions or prophylactic FIX infusions because of frequent prior bleeding episodes
* Able to give informed consent and comply with requirements of the trial
* Currently free of inhibitor and have no history of inhibitors to FIX protein
* A negative family history for the development of an inhibitor,
* Willing to practice a reliable barrier method of contraception until 3 sequential samples are negative for vector genomes using our PCR assay.

Exclusion Criteria:

* Evidence of active infection with Hepatitis B or C virus as reflected by HBsAg or NCV RNA positivity, respectively. To be considered negative for active infection, two negative assays at a minimum of a six month interval are required.
* Exposure to Hepatitis B or C who are currently on antiviral therapy.
* Serological evidence of HTLV or active HIV infection. Individuals who are effectively being treated with antiretroviral therapy are eligible. Specific criteria for effectiveness of treatment include the following:

  * Documented CD4+ T-cell count of \> 350 cells/mm\^3.
  * HIV-1 RNA viral load \< 400 copy/ml for at least the past 12 months, including at least 2 viral load test results of \< 400 copy/ml during the immediate 12 month interval prior to screening.
  * Screening HIV-RNA viral load \< 400 copies/ml.
  * Stable HAART regimen (drugs of at least 2 different classes) for at least 12 months prior to study entry. Treatment regimen changes for dosing convenience and in response to toxicity are permitted.
  * Documented and confirmed (repeated) viral loads of ≥ 400 copies/ml during the 12 month time interval prior to screening are bases for exclusion although a single, unconfirmed, "glimpse" of ≥ 400 copies/ml are permitted.
* Significant liver dysfunction as defined by an abnormal ALT (alanine transaminase), bilirubin, alkaline phosphatase or INR. Potential participants who have had a liver biopsy in the past 3 years will be excluded if they have significant fibrosis of 3 or 4 as rated on a scale of 0-4.
* Coronary artery disease as a co-morbid condition
* Platelet count of \<50 x 10\^9/l
* Creatinine ≥ 1.5 mg/dl
* Hypertension with systolic blood pressure (BP) ≥ 140 mmHg or diastolic BP ≥ 90 mmHg
* History of active tuberculosis, fungal disease or other chronic infection
* History of chronic disease that would adversely affect performance other than hemophilic arthropathy
* Detectable antibodies reactive with AAV8
* Subjects who are unwilling to provide the required semen samples
* Poor performance status (WHO performance status score \>1) or
* Received an AAV vector or any other gene transfer agent in the previous 6 months
* Presence of lung nodule(s) suspicious of malignancy on screening chest tomography
* Presence of liver abnormalities suspicious of malignancy on screening liver ultrasound
D: Inclusion Criteria:

* Body weight \>/= 40 kilogram (kg) at the time of screening
* Diagnosis of severe congenital hemophilia A
* Documentation of the details of prophylactic or episodic FVIII treatment and of number of bleeding episodes for at least the last 24 weeks
* Adequate hematologic function
* Adequate hepatic function
* Adequate renal function
* For women of childbearing potential: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraceptive methods that result in a failure rate of less than (\<) 1 percent (%) per year during the treatment period and for at least 5 elimination half-lives (24 weeks) after the last dose of study drug

Exclusion Criteria:

* Inherited or acquired bleeding disorder other than hemophilia A
* Previous or current treatment for thromboembolic disease or signs of thromboembolic disease
* Conditions that may increase risk of bleeding or thrombosis
* History of clinically significant hypersensitivity associated with monoclonal antibody therapies or components of the emicizumab injection
* Known human immunodeficiency virus (HIV) infection with cluster of differentiation (CD) 4 count \<200 cells per microliter (cells/mcL) within 24 weeks prior to screening. Participants with HIV infection who has CD4 greater than (\>) 200 and meet all other criteria are eligible
* Use of systemic immunomodulators at enrollment or planned use during the study, with the exception of anti-retroviral therapy
* Participants who are at high risk for thrombotic microangiopathy (TMA) (for example, have a previous medical or family history of TMA), in the investigator's judgment
* Concurrent disease, treatment, or abnormality in clinical laboratory tests that could interfere with the conduct of the study, may pose additional risk, or would, in the opinion of the investigator, preclude the participant's safe participation in and completion of the study
* Planned surgery (excluding minor procedures) during the study
* Receipt of emicizumab in a prior investigational study; an investigational drug to treat or reduce the risk of hemophilic bleeds within 5 half-lives of last drug administration; a non-hemophilia-related investigational drug concurrently, within last 30 days or 5 half-lives, whichever is shorter
* Pregnant or lactating, or intending to become pregnant during the study

Answer: A