While shark interactions are rare events, there is a risk inherent in swimming in any waterway. The only way that you can 100% guarantee you will not have a shark interaction is not to go into the water.
The fact is that the ocean is the sharks' domain. Sharks are a natural and important part of the ocean environment, and when we enter open waters we are entering their domain – not a swimming pool.
No program or combinations of programs in open waters can ever totally eliminate shark interactions.
One of the simplest things swimmers can do is to stay between the flags when swimming at the beach. This is the best place to swim because the area is patrolled and observed by lifesavers and lifeguards who are there to monitor risks and maximise swimmer safety.