Please choose the correct ending to complete the given sentence: Health: [header] How to prevent measles [title] Speak to your doctor about the vaccination. [step] The best way to prevent measles is to get vaccinated against the virus. The measles vaccine is 97% effective at preventing measles and works right away.

Ending1: However, if you have concerns, your doctor may offer you different options. [substeps] Most vaccines rely on the body's immunity against being vaccinated against the measles virus. Ending2: It is considered very safe for use on children, teenagers, and adults. Speak to your doctor about getting the vaccine if you do not have it already. Ending3: You should also think about getting an emergency dose of the vaccines you are need right away or even nine weeks prior to your expected vaccination date. Always contact your doctor in case something goes wrong and it doesn't go away after you have had an initial dose of the vaccine. Ending4: If you get one in a 12 month period, you should have it for months or more, and if you wait so long, you may have the disease in your blood on another level. Don't wait on the vaccine for a 2 month period, or it will not work.

Answer format: ending1/ending2/ending3/ending4