The US makes visitors get certain vaccinations before being able to visit https://travel.state.gov/content/travel/en/us-visas/immigrate/vaccinations.html https

The US makes visitors get certain vaccinations before being able to visit https://travel.state.gov/content/travel/en/us-visas/immigrate/vaccinations.html https://travel.state.gov/content/travel/en/us-visas/immigrat... Assuming a vaccine comes out, Australia can make US visitors get vaccinated before visiting.