Illustration of boy demonstrating proper use of metered dose inhaler with spacer attached.

"Nifurtimox antiparasitic drug molecule. Used in treatment of Chagas disease and sleeping sickness. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), sulfur (yellow). "

"Nystatin antifungal drug molecule. Used in treatment of Candida infections. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Pyridostigmine cholinesterase drug molecule. Used in treatment of myasthenia gravis and as antidote to some nerve agents. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Nifurtimox antiparasitic drug molecule. Used in treatment of Chagas disease and sleeping sickness. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), sulfur (yellow). "

"Nifurtimox antiparasitic drug molecule. Used in treatment of Chagas disease and sleeping sickness. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), sulfur (yellow). "

"Lamivudine (3TC) antiviral drug molecule. Used in treatment of HIV and hepatitis B virus. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), sulfur (yellow). "

"Lamivudine (3TC) antiviral drug molecule. Used in treatment of HIV and hepatitis B virus. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), sulfur (yellow). "

"Pyridostigmine cholinesterase drug molecule. Used in treatment of myasthenia gravis and as antidote to some nerve agents. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue). "

Woman receiving head massage

Illustration of boy demonstrating proper use of metered dose inhaler with open-lip technique; canister mouthpiece is surrounded by lips.

Woman receiving a facial

Boy receiving oxygen treatment