Study Assessing the Long-term Effect of Dupilumab on Prevention of Lung Function Decline in Adult Patients With Uncontrolled Moderate to Severe Asthma

Inclusion Criteria: * Participant must be at least 18 (or the legal age of consent in the jurisdiction in which the study is taking place) years of age inclusive, at the time of signing the informed consent. * Patients with a physician diagnosis of asthma (according to Global Initiative for Asthma (GINA) 2021) for ≥12 months * Treatment with medium to high dose inhaled corticosteroids (ICS) in combination with a second controller (eg, long-acting beta-2 adrenergic receptor agonists (LABA), leukotriene receptor antagonists (LTRA) with a stable dose ≥1 month prior to Visit 1. Patients requiring a third controller for their asthma will be considered eligible for this study, and it should also be on stable dose ≥1 month prior to Visit 1. Patients requiring an additional controller as a fourth controller (Montelukast) for another type 2 comorbid condition such as allergic rhinitis will be considered eligible for this study, and should be on a stable dose for ≥1 month prior to Visit 1. * Pre-bronchodilator forced expiratory volume (FEV1) ≤ 80% of predicted normal for adults at Visits 1 and 2, prior to randomization * Asthma Control Questionnaire 5-question version (ACQ-5) score ≥1.5 at Visits 1 and 2, prior to randomization. * Variable airflow obstruction as documented by one or more of the following (at least 1 needs to be met): i) Positive reversibility test: ≥12% and 200 mL improvement in FEV1 after SABA administration prior to randomization, or documented in the 24 months p…