Guys from Jetpac City Guides collected and processed over 100,000,000 photos posted on Instagram and taken from various spots across America, in an effort to address the happiest city and build US cities smile index. Cast a smile before start reading.

Asthma might involve to a fatal disease if no or improper treatment is followed. About 7 million children worldwide are suffering from this dreadful disorder while death rate has dramatically increased by 80% since 80s. This report presents an overview of the situation.