Humanigen Launches Managed Access Program for Lenzilumab

Humanigen, Inc. (Nasdaq: HGEN), a clinical-stage biopharmaceutical company focused on preventing and treating an immune hyper-response called ‘cytokine storm,’ announced today that lenzilumab is now available for certain hospitalized COVID-19 patients through its newly-launched Managed Access Program (“LenzMAP™”). Clinigen Group plc (“Clinigen”), a global pharmaceutical Services and Products company, is implementing the program. Lenzilumab is an investigational product and is not currently authorized or approved in any country.

Clinigen is an expert in delivering specialty therapies on a named-patient basis in the UK and Europe.

Lenzilumab is available via LenzMAP in the following 17 countries:

• Austria
• Bulgaria
• Croatia
• Cyprus
• Denmark
• Estonia
• France
• Greece
• Ireland
• Lithuania
• Luxembourg
• Netherlands
• Portugal
• Spain
• Sweden
• Switzerland
• United Kingdom

LenzMAP will enable access to lenzilumab on a case-by-case basis for hospitalized patients with COVID-19 for whom the treating physician deems there are no suitable alternatives and where regulations allow.

“We are pleased to be working with Clinigen to provide access to lenzilumab on a patient-by-patient basis in the United Kingdom and certain other European countries,” said Timothy E. Morris, COO and CFO of Humanigen. “While we continue to pursue our development program for lenzilumab and seek to attain appropriate authorizations or approvals for its potential commercial use in the United States, European Union and United Kingdom, LenzMAP will enable Humanigen to respond to requests from healthcare professionals for access to lenzilumab to treat certain hospitalized patients where allowed by local regulations.”

Clinigen will manage key elements of LenzMAP, including regulatory oversight, reimbursement, logistics, and access management.

“We are proud to partner with Humanigen in offering this potential treatment option for certain hospitalized patients with COVID-19 in the UK and across Europe. LenzMAP underscores Clinigen’s strength in partnering with biotechnology companies to provide services that enable quicker and broader access to critical medicines,” commented Pete Belden, Executive Vice President Services Division, Clinigen.

Clinigen currently oversees more than 161 similar managed access programs for other companies and has access to over 20,000 healthcare providers in 5,000 hospitals across more than 120 countries.

“As we move from the pandemic stage to the endemic stage of COVID-19, healthcare professionals continue to see vaccinated and unvaccinated patients alike presenting with elevated inflammatory markers,” stated Andrea Aroldi, MD, San Gerardo Hospital (Monza, Italy). “Now that lenzilumab is available on a compassionate-use/named-patient basis in certain European countries, physicians have available an additional treatment option, an immunomodulator, in their armamentarium of therapies in the fight against COVID-19.”

Healthcare professionals may obtain details about LenzMAP™ by calling the Clinigen customer service team at +44 (0) 1932 824100, e-mailing MedicineAccess@clinigengroup.com, or going online at www.clinigendirect.com.

Patients seeking medical information should contact their physician.

About Humanigen

Humanigen, Inc. (Nasdaq: HGEN) (“Humanigen”), is a clinical-stage biopharmaceutical company focused on preventing and treating an immune hyper-response called ‘cytokine storm’. Lenzilumab is a first-in-class antibody that binds to and neutralizes granulocyte-macrophage colony-stimulating factor (GM-CSF). Results from preclinical models indicate GM-CSF is an upstream regulator of many inflammatory cytokines and chemokines involved in the cytokine storm. Humanigen is developing lenzilumab as a treatment for cytokine storm associated with COVID-19 and CD19-targeted CAR-T cell therapies and is also exploring the effectiveness of lenzilumab in other inflammatory conditions such as acute Graft versus Host Disease in patients undergoing allogeneic hematopoietic stem cell transplantation, eosinophilic asthma, and rheumatoid arthritis. For more information, visit www.humanigen.com and follow Humanigen on LinkedIn, Twitter, and Facebook.

About Clinigen

Clinigen Group plc (AIM: CLIN) is a global, specialist pharmaceutical services and products platform focused on providing ethical access to medicines. Its mission is to deliver the right medicine to the right patient at the right time. The Group operates from sites in North America, Europe, Africa, and the Asia Pacific. Clinigen has more than 1,000 employees across five continents in 14 countries, with supply and distribution hubs and operational centres of excellence in key long-term growth regions. The Group works with 34 of the top 50 pharmaceutical companies, interacting with over 5,000 hospitals across more than 120 countries. For more information on Clinigen, please visit http://www.clinigen.com.

Forward-Looking Statements

All statements other than statements of historical facts contained in this press release are forward-looking statements. Forward-looking statements reflect management's current knowledge, assumptions, judgment, and expectations regarding future performance or events. Although management believes that the expectations reflected in such statements are reasonable, they give no assurance that such expectations will prove to be correct, and you should be aware that actual events or results may differ materially from those contained in the forward- looking statements. Words such as "will," "expect," "intend," "plan," "potential," "possible," "goals," "accelerate," "continue," and similar expressions identify forward-looking statements, including, without limitation, statements regarding our plans relating to lenzilumab.

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Contact information

Humanigen Investor Relations
Timothy E. Morris, COO & CFO
Humanigen, Inc.
tmorris@humanigen.com
+1 650-400-6874

Clinigen plc
Pete Belden, EVP Services Division
Rob Fox, VP Investor Relations and Corporate Development
investors@clinigengroup.com
+44 (0) 1283 495010

Consilium Strategic Communications
Mary-Jane Elliott / Matthew Cole / Jessica Hodgson
+44 (0) 20 3709 5700
Clinigen@consiliumcomms.com