The arched bridge is at the entrance to
the huge St. Mary's NHS Hospital on Praed Street. Under the arch on the left is
the lab where penicillin was discovered in 1928, eventually leading to
modern-day antibiotics and the saving of millions of lives. The room has been
kept as museum and is open to the public. Alexander Fleming won the Nobel prize
for his work, but he warned that bacteria would develop resistance to
antibiotics whenever too little was used or when they were used for too short a
period.