Fungal infections, which already kill 1 million people each year, are developing resistance to frontline medicines.
Researchers say fungicides on crops are a major reason behind the spread. The problem is similar to that of antibiotic resistance, but the arsenal of anti-fungal drugs is even smaller than the shrinking pool of antibiotics.
Those with weakened immune systems are most vulnerable to deadly fungal infections, like aspergillus and candida fungi infections. In sub-Saharan Africa, where millions are infected with HIV, cryptococcus and pneumocystis fungi cause more than a half a million deaths per year.