Answer:
2 methods:
Explanation: 1. The government could put some restrictions that the individuals would follow to keep everyone safe.
2. For people not to worry, vaccines could be made in the help of some individuals that know how to make vaccines. Then from birth as fast as possible you would get the vaccine and insure safety for everyone. (Ofc it depends how long the vaccine lasts, from what certain age you have to take it and if you are not allergic to anything)
Now the challenges. Hardest part is to convince people to follow the restrictions and take the vaccines. Some people might not believe the government nor listen.