I believe, in the few decades, Antibiotic Resistance could be a bigger challenge.
Everyone is responsible for this; Patients, Doctors and The Government.
For example, I have seen Patients buying 3rd generation Cephalosporin for the common cold (without prescription), which doesn't make any sense, Doctors Prescribing randomly and The Government not being responsible. Patients need serious Awareness programs from The Government, and The Government should strictly Stop Medication without Prescription. Doctors should be Responsible for Prescribing precisely.
Else, it could be too late to suffer the disaster.