H1N1 Influenza Vaccine Fact Sheet

H1N1 Influenza Vaccine

Who should be vaccinated?

Initial target group:

  • Pregnant women
  • Household contacts and caregivers of children under six months
  • Healthcare and emergency medical personnel
  • Everyone 6 months to 24 years of age
  • People 25 through 64 who have underlying health problems that put them at high risk for flu complications.

Secondary groups:  Once target groups have been vaccinated, coverage should be offered to healthy people 25 to 64.

Vaccination for people 65 and older is not recommended until all others have received the vaccine because people in this age group appear to have less risk of getting the virus.

When to get it?
  • As soon as it becomes available
  • According to the CDC, the seasonal flu and the H1N1 shots can be given on the same day. However, patients who choose to be vaccinated with the live-nasal spray vaccines should get them at least 4 weeks apart.
How many doses are needed?

Adults and children 10 to 17 - one dose

Children 6 months to 9 years – two doses, given about 21 to 28 days apart

Safety/potential side effects of the vaccine?

The H1N1 vaccines have been produced using the same processes and in the same facilities that make the seasonal flu vaccine.

Potential side effects are expected to be similar to those seen with the seasonal flu vaccine:

  • For the injection – The most common side effect is soreness at the injection site. May also cause redness, swelling at the site of the injection, fainting, headache, muscle aches, fever, nausea and fatigue for a few days after the vaccination.
  • For the nasal spray vaccine - The most common side effects include runny nose or nasal congestion. Adults may get a sore throat and children 2 to 6 may get a fever.
Why Should You Get It?
  • As of September 19, widespread flu activity is being reported in 26 states.
  • 99 percent of flu cases are the H1N1 type
  • The seasonal flu vaccine will not protect against the H1N1 virus
  • Between August 30 and September 19, the CDC reports there were 10,082 hospitalizations and 936 deaths in the U.S. associated with flu infection.
H1N1 Vaccines

As of September 15, 2009, the FDA has approved four vaccines against the 2009 H1N1 influenza virus. Three are given by injection and one is given through a nasal spray.

Injectable vaccines:

Intranasal vaccine: