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:

* Body weight \>/= 40 kilograms (kg) at the time of screening
* Diagnosis of congenital hemophilia A of any severity and documented history of high-titer inhibitor ( that is \[i.e.\], \>/= 5 Bethesda Units \[BU\])
* Documentation of treatment with episodic or prophylactic bypassing agents for at least the last 24 weeks
* \>/= 6 bleeds in the last 24 weeks prior to screening (if on an episodic bypassing agent regimen) or \>/=2 bleeds in the last 24 weeks prior to screening (if on a prophylactic bypassing agent regimen)
* Adequate hematologic, hepatic and renal function
* For women who are not postmenopausal or surgically sterile: agreement to remain abstinent or use single or combined highly effective contraceptive methods

Exclusion Criteria:

* Participants with inherited or acquired bleeding disorder other than hemophilia A
* Participants with ongoing (or plan to receive during the study) immune tolerance induction therapy or prophylaxis with Factor VIII (FVIII), with the exception of participants who have received a treatment regimen of FVIII prophylaxis with concurrent bypassing agent prophylaxis
* Previous (in the past 12 months) or current treatment for thromboembolic disease (with the exception of previous catheter-associated thrombosis for which antithrombotic treatment is not currently ongoing) or current signs of thromboembolic disease
* Participants with other conditions (for example \[e.g.\], certain autoimmune diseases) that may increase the 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 4 (CD4) count \< 200 cells per microliter (cells/mcL) within 24 weeks prior to screening
* Use of systemic immunomodulators (e.g., interferon or rituximab) at enrolment or planned use during the study, with the exception of antiretroviral therapy
* Participants who are at high risk for thrombotic microangiopathy (TMA; e.g., 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 or that would, in the opinion of the investigator or Sponsor, preclude the participant's safe participation in and completion of the study or interpretation of the study results
* Planned surgery (excluding minor procedures such as tooth extraction or incision and drainage) 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 within last 30 days or 5 half-lives, whichever is shorter; An investigational drug concurrently
* Unwillingness to use highly effective contraception methods for the specified duration in the protocol (females only, unless required otherwise by the local health authority)
* Clinically significant abnormality on screening evaluations or laboratory tests that, in the opinion of the investigator, may pose an additional risk in administering study drug to the participant
* Pregnancy or lactation, or intent to become pregnant during the study
B: Inclusion Criteria:

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

Exclusion Criteria:

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

* Severe hemophilia B defined as ≤ 2 IU/dl (≤ 2%) endogenous FIX
* Male \< 12 years and weight ≥ 13 kg
* History of at least 50 documented prior exposure days to FIX
* No history of, or currently detectable, inhibitor

Key Exclusion Criteria:

* Other coagulation disorders in addition to Hemophilia B
* History of anaphylaxis associated with any FIX or IV immunoglobulin administration

NOTE: Other protocol defined Inclusion/ Exclusion criteria may apply.
D: INCLUSION CRITERIA:

* Participants transitioning from another BAX 855 study who meet ALL of the following criteria are eligible for this study:

  1. Participant has completed the end of study visit of a BAX 855 study or is transitioning from the ongoing Baxalta Continuation Study 261302.
  2. Participant is either receiving on-demand treatment or prophylactic treatment with BAX 855 and had an Annual Bleed Rate (ABR) of ≥ 2 documented and treated during the past 12 months.
  3. Participant is human immunodeficiency virus negative (HIV-); or HIV+ with stable disease and CD4+ count ≥ 200 cells/mm\^3, as confirmed by central laboratory.
  4. Participant is willing and able to comply with the requirements of the protocol.
* Newly recruited participants (ie not transitioning from another BAX 855 study) including BAX855 naïve participants who meet ALL of the following criteria are eligible for this study:

  1. Participant has severe hemophilia A (FVIII clotting activity \< 1%) as confirmed by central laboratory OR by historically documented FVIII clotting activity performed by a certified clinical laboratory, optionally supported by a FVIII gene mutation consistent with severe hemophilia A
  2. Participant has been previously treated with plasma-derived FVIII concentrates or recombinant FVIII for ≥ 150 documented exposure days (EDs)
  3. Participant is either receiving on-demand treatment or prophylactic treatment and had an annual bleeding rate of ≥ 2 documented and treated during the past 12 months.
  4. Participant has a Karnofsky performance score of ≥ 60 at screening
  5. Participant is HIV-; or HIV+ with stable disease and CD4+ count ≥ 200 cells/mm\^3, as confirmed by central laboratory at screening
  6. Participant is hepatitis C virus negative (HCV-) by antibody (if positive, additional PCR testing will be performed), as confirmed by central laboratory at screening; or HCV+ with chronic stable hepatitis
  7. If female of childbearing potential, participant presents with a negative urine pregnancy test and agrees to employ adequate birth control measures for the duration of the study
  8. Participant is willing and able to comply with the requirements of the protocol.

EXCLUSION CRITERIA:

* Participants transitioning from another BAX 855 study who meet ANY of the following criteria are not eligible for this study:

  1. Participant has developed a confirmed inhibitory antibody to FVIII with a titer of ≥ 0.6 BU using the Nijmegen modification of the Bethesda assay as determined at the central laboratory during the course of the previous BAX 855 study.
  2. Participant has been diagnosed with an acquired hemostatic defect other than hemophilia A.
  3. The participant's weight is \< 35 kg or \> 100 kg.
  4. Participant's platelet count is \< 100,000/mL.
  5. Participant has an abnormal renal function (serum creatinine \> 1.5 times the upper limit of normal).
  6. Participant has active hepatic disease with alanine aminotransferase (ALT) and/or aspartate aminotransferase (AST) levels ≥ 5 times the upper limit of normal.
  7. Participant is scheduled to receive a systemic immunomodulating drug (e.g. corticosteroid agents at a dose equivalent to hydrocortisone greater than 10 mg/day, or α-interferon) other than anti-retroviral chemotherapy during the study.
  8. Participant has a clinically significant medical, psychiatric, or cognitive illness, or recreational drug/alcohol use that, in the opinion of the investigator, would affect participant's safety or compliance.
  9. Participant is planning to take part in any other clinical study during the course of the study.
  10. Participant is a member of the team conducting this study or is in a dependent relationship with one of the study team members. Dependent relationships include close relatives (ie, children, partner/spouse, siblings, parents) as well as employees of the investigator or site personnel conducting the study.

Newly recruited participants (ie not transitioning from another BAX 855 study) who meet ANY of the following criteria are not eligible for this study:

1. Participant has detectable FVIII inhibitory antibodies (≥ 0.6 BU using the Nijmegen modification of the Bethesda assay) as confirmed by central laboratory at screening.
2. Participant has a history of confirmed FVIII inhibitors with a titer ≥ 0.6 Bethesda Units (BU) (as determined by the Nijmegen modification of the Bethesda assay or the assay employed with the respective cut-off in the local laboratory) at any time prior to screening.
3. Participant has been diagnosed with an inherited or acquired hemostatic defect other than hemophilia A (eg, qualitative platelet defect or von Willebrand's disease).
4. The participant's weight is \< 35 kg or \> 100 kg.
5. Participant's platelet count is \< 100,000/mL.
6. Participant has known hypersensitivity towards mouse or hamster proteins, PEG or Tween 80.
7. Participant has severe chronic hepatic dysfunction \[eg, ≥ 5 times upper limit of normal alanine aminotransferase (ALT) and/or aspartate aminotransferase (AST), as confirmed by central laboratory at screening, or a documented INR \> 1.5\].
8. Participant has severe renal impairment (serum creatinine \> 1.5 times the upper limit of normal).
9. Participant has current or recent (\< 30 days) use of other pegylated drugs prior to study participation or is scheduled to use such drugs during study participation.
10. Participant is scheduled to receive during the course of the study, a systemic immunomodulating drug (e.g. corticosteroid agents at a dose equivalent to hydrocortisone greater than 10 mg/day, or α-interferon) other than anti-retroviral chemotherapy.
11. Participant has participated in another clinical study involving an IP or investigational device within 30 days prior to enrollment or is scheduled to participate in another clinical study involving an IP or investigational device during the course of this study.
12. Participant has a medical, psychiatric, or cognitive illness or recreational drug/alcohol use that, in the opinion of the investigator, would affect participant safety or compliance.
13. Participant is a member of the team conducting this study or is in a dependent relationship with one of the study team members. Dependent relationships include close relatives (ie, children, partner/spouse, siblings, parents) as well as employees of the investigator or site personnel conducting the study.

Answer: B