For general healthcare: existing antibiotics become ineffective and new drugs have to be researched. Unfortunately, no new classes of antibiotics have been developed since the 80s, because infectious diseases have become treatable via antibiotics and there has been no need for new drugs. Antibiotic-resistance is appearing recently due to the increase in self-medication; because new drug development is a process that takes years, it may not be until another 10 years when we will have new antibiotics to fight resistant bacteria.
Antibiotic resistance is the reason why it is important to take antibiotics only when and as prescribed by a doctor. Not all infections are treatable by antibiotics, and not any antibiotic works with any infection. Also, in most cases where the bacterial infection is mild, it will heal on its own without any need for antibiotics.