Inclusion Criteria:

- Body mass index (BMI) ≥ 18.0 and ≤ 32.0 kg/m2 at Screening and weighs at least 50 kg.

- Medically healthy with no clinically significant medical history, physical
examination, spirometry, vital signs or ECGs.

- Forced expiratory volume in 1 second (FEV1) ≥80%.

- No clinically significant abnormalities in the results of laboratory evaluations.

- Female subjects must be either of non-childbearing potential or if of childbearing
potential, subject must not be pregnant or breastfeeding, and must agree to use a
highly effective birth control method.

- Male subjects must agree to use condoms, in addition to the use of highly effective
pregnancy prevention measures with female partners of childbearing potential.

- Understands the correct technique for the use the nebulizer device(s).

- Other inclusion criteria apply

Exclusion Criteria:

- History or presence of clinically significant medical or psychiatric condition.

- Abnormal ECG measurements at Screening.

- Any signs of respiratory tract infection within 6 weeks of Screening.

- Subject who has a current bacterial, parasitic, fungal, or viral infection; any
infection requiring hospitalization or intravenous antibiotics within 6 months prior
to Screening.

- Positive test for SARS-CoV-2

- Subject has any condition of the oro-laryngeal or respiratory tract.

- Uses or has used tobacco or nicotine-containing products (e.g., cigarettes, cigars,
chewing tobacco, snuff, patches etc.) within 6 months prior to screening

- Additional exclusion criteria apply