Influenza Vaccine Are We In The Same Page? Jehad Abdalla.M.D Infectious Diseases Consultant Al Rahba Hospital Abu Dhabi - UAE
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1 Influenza Vaccine Are We In The Same Page? Jehad Abdalla.M.D Infectious Diseases Consultant Al Rahba Hospital Abu Dhabi - UAE
2 Objectives. Recognize Influenza types and characteristics. Recognize Influenza serious complications Recognize how influenza spreads in hospitals. Recognize importance of Influenza vaccine in preventing influenza infection. Recognize importance of mandatory Influenza vaccine among HCW.
3 Remembering the 1918 Influenza Pandemic
4 The 1918 Influenza Pandemic Marks the 100th anniversary This year marks the 100th anniversary of the 1918 influenza (flu) pandemic that swept the globe in what is still one of the deadliest disease outbreaks in recorded history CAN YOU GUESS HOW MANY PEOPLE DIED?
5 The 1918 Influenza Pandemic Marks the 100th anniversary At least 50 million deaths worldwide More people died during the 1918 pandemic than the total number of military and civilian deaths in World War I An estimated 1/3 of the world s population was infected with the 1918 flu virus
6 life expectancy is 54 years of age for women and 48 years of age for men
7 Spring and fall waves of influenza ( flu ) activity cause the average life expectancy in the United States to fall by 12 years. 42 female and 36 the male
8 Third wave of pandemic flu activity occurs. Pandemic subsides, but virus (H1N1) continues to circulate seasonally for 38 years.
9 First isolation of influenza, proving that flu is caused by a virus not a bacterium
10 H2N2 flu virus emerges to trigger a pandemic, replacing the 1918 H1N1 pandemic virus.
11 The U.S. Public Health Service recommends annual flu vaccination for people at high risk of serious flu complications.
12 H3N2 flu virus emerges to trigger a pandemic, replacing H2N2 virus
13 Genome of the 1918 pandemic flu virus is fully sequenced
14 H1N1 viruses distantly related to the 1918 virus emerge to trigger a pandemic.
15 Let us wake you up! An old person above the age of 65 should not take Influenza vaccine?
16 Let us wake you up! If I have egg allergy I can not take Influenza vaccine?
17 Let us wake you up! If I develop face swelling and breathing problem after an Influenza vaccine, then I should not take it again?
18 Let us wake you up! Influenza can kill only people with weak immunity?
19 A, B and C influenza viruses Influenza A and B viruses cause seasonal epidemics, while type C viruses cause mild respiratory illness Influenza B viruses can be classified into two antigenically distinct lineages, Yamagata and Victoria like viruses Influenza A and B strains are included in each year's influenza vaccine The vaccine does not protect against influenza C viruses
20 Influenza Types A and B Type A (Seasonal, Avian, Swine influenza) Type B (Seasonal influenza) Can cause significant disease Generally causes milder disease but may also cause severe disease Infects humans and other species (e.g. birds; H5N1 or Swine; H1N1) Limited to humans Can cause epidemics and pandemics (worldwide epidemics) Generally causes milder epidemics
21 Signs and symptoms of influenza Sudden onset Headache, fever,chills and cough, followed rapidly muscle aches and fatigue. Also runny nose, sneezing, watery eyes and throat irritation Nausea, vomiting and diarrhea may also occur, especially in children
22 22
23 How serious is influenza? Complications can include Pneumonia (bacterial and viral) Ear and sinus infections Dehydration Worsening of chronic medical conditions, such as congestive heart failure, asthma, or diabetes
24 Burden of Seasonal Influenza Prevalence Annual global attack rate estimated at 5-10% in adults 20-30% in children Complication WHO estimates that respiratory deaths occur each year associated to seasonal influenza Up to 3 to 5 million cases of severe illness Annual cost of Influenza Annual cost of Influenza in the USA is $ 8.3 billion Reference: *McLaughlin, JM., Tan, L., et al J Prim Prev Aug;36(4):259-73: Estimated Human and Economic Burden of Four Major Adult Vaccine-Preventable Diseases in the United States, 2013
25 Influenza Mortality-Abu Dhabi DOH Influenza Report
26 How serious is the issue of influenza vaccine? The CDC (US) conducted a study to assess the effectiveness of influenza vaccine in decreasing influenza related deaths in children (6 -The months study to concluded 17 years of that age) influenza vaccination was associated with reduced Between risk July of laboratory-confirmed 2010 and June 2014, 358 influenza-associated children died from pediatric infection death with. influenza; researchers were able to confirm the vaccine status of -Influenza 291 of these vaccination children. could prevent influenza associated deaths among children Of the 291 and children adolescents 74% were unimmunized. Flannery B, Reynolds SB, Blanton L, et. al. Influenza Vaccine Effectiveness Against Pediatric Deaths. Pediatrics DOI: /peds ).
27
28 Influenza-Epidemiology All age groups can be affected influenza. People at greater risk of severe disease or complications are: Children younger than age 2 years Adults aged 65 years or older Pregnant women People of any age with medical conditions such as chronic heart, lung, kidney, liver, blood, diabetes or weakened immune systems
29 Influenza-Epidemiology Health care workers are at high risk of acquiring influenza virus infection due to increased exposure to the patients and risk further spread particularly to vulnerable individuals.
30 Timing of Vaccine Optimally, vaccination should occur before onset of influenza activity in the community. Vaccination should be offered by September, if possible. Vaccination should be offered as long as influenza viruses are circulating and unexpired vaccine is available. Children aged 6 months through 8 years who require 2 doses should receive their first dose as soon as possible after vaccine becomes available, and the second dose 4 weeks later.
31 Pregnant Women All women who are pregnant or who might be pregnant during the influenza season should receive influenza vaccine. Any licensed, recommended, influenza vaccine may be used. Influenza vaccine can be administered at any time during pregnancy, before and during the influenza season
32 Immunocompromised Persons Immunocompromised persons should receive an ageappropriate vaccine Immune response to vaccines might be blunted in immunocompromised persons. Timing of vaccination might be a consideration (e.g., in some period before or after an immunocompromising intervention).
33 Persons with a History of Egg Allergy Persons who are able to eat lightly cooked egg (e.g., scrambled egg) without reaction are unlikely to be eggallergic. Persons who have experienced only hives after exposure to egg should receive any licensed, recommended, ageappropriate influenza vaccine Persons reporting symptoms other than hives, vaccine should be administered in an inpatient or outpatient medical setting and supervised by a health care provider who is able to recognize and manage severe allergic conditions.
34 Severe allergic reaction to influenza vaccine A previous severe allergic reaction to influenza vaccine( such as angioedema, respiratory distress, lightheadedness, or recurrent emesis; or who required epinephrine or another emergency medical intervention) is a contraindication to future receipt of the vaccine
35 How influenza spread? from a person to person when those with influenza cough or sneeze (droplet spread). The droplets are propelled about one meter through the air. People may also become infected by touching an object or a surface that has the influenza virus on it and then touching their mouth, eyes or nose One meter The time period from exposure to development of symptoms is about 1 to 4 days, with an average of about 2 days
36 For How Long Contagious? The period when an infected person is contagious depends on the age and health of the person Young children and people with weakened immune systems may be contagious for longer than a week
37 Flu Myths & Facts Vaccines can be dangerous and may have adverse health effects Almost all people who get an influenza vaccine do not experience serious problems. My have sore arm. May also experience fever, muscle pain, and feelings of discomfort or weakness. If experienced at all, these side effects typically last 1-2 days after vaccination and are much less severe than actual flu illness
38 Flu Myths & Facts The flu vaccine can cause the flu The flu vaccine is an inactivated (killed), therefore, the flu vaccine cannot cause the flu. However, it typically takes two weeks for the flu vaccine to become effective. During those two weeks, it is still possible for an individual to get the flu or another respiratory virus
39 Flu Myths & Facts Healthy people don t need a flu vaccine -Anyone can get the flu; even young, healthy people are at risk. -Getting vaccinated every year is important, regardless of how healthy a person is. -Vaccination can help prevent the spread of the virus to others who are more vulnerable to the flu and related complications
40 Flu Myths & Facts Flu vaccination is not necessary each year Immune protection from the flu vaccine declines over time, so annual vaccination is critical to provide the best protection. The vaccine may change each year to match circulating flu viruses, it is important to get vaccinated each year.
41 Flu Myths & Facts The flu is nothing more than just a bad cold -Flu is distinct from bad cold-it s more serious, and can cause high fever, head and body aches, and severe fatigue for up to two weeks or more -Flu can also lead to more serious complications and even death
42
43 Asymptomatic spread!! Those infected can be contagious before any signs of the flu are present. Individuals with influenza are infectious 1 day before symptoms develop and up to 5 days after becoming ill. Some people can be infected but have no symptoms,these individuals can still spread the virus to others
44 Asymptomatic Influenza infection among HCW In one published study, 59% of health care workers tested had evidence of recent influenza infection but could not recall having symptoms.
45
46 Effectiveness of influenza vaccine Depends on the similarity between vaccine strains and the strains in circulation during influenza season, as well as individual factors. Influenza immunization prevents disease in 45-85% of healthy individuals.
47 A vaccine that is not perfectly matched can still offer protection against related viruses making illness milder and preventing complications Effectiveness of influenza vaccine
48 Effectiveness of influenza vaccine in the elderly Effectiveness is about half of that of healthy adults; however influenza immunization decreases the incidence of pneumonia, hospital admission and death in the elderly.
49 Why annual vaccine? First, the body s immune response from vaccination declines over time, so an annual vaccine is needed for optimal protection. Second, Influenza viruses are constantly changing, the formulation of the flu vaccine is reviewed each year and sometimes updated to keep up with changing flu viruses.
50 Does flu vaccine work right away? No It takes about two weeks after vaccination for antibodies to develop in the body and provide protection against influenza virus infection. That s why it s better to get vaccinated early in the fall, before the flu season really gets under way
51 Health Care Workers Health care workers (HCWs) who have direct patient contact should consider it their responsibility to provide the highest standard of care, which includes annual influenza immunization In the absence of contraindications, refusal of HCWs who have direct patient contact to be immunized against influenza implies failure in their duty of care to patients
52 Facts about influenza vaccine for healthcare workers Most cases for influenza vaccine addiction by healthcare workers are based on wrong information or misunderstanding. The most common reason reported for not getting vaccinated was that they don t think that flu vaccines work. The second most common reason was that they don t need the vaccine.
53 Reasons HCW decline influenza vaccination: Misconception that vaccination can cause influenza (10-45%). Fear of adverse events (8-54%). Times/locations of vaccination were unsuitable (6-59%). Perception that they are not at risk (6-58%). Fear of injections (4-26%). Lack of vaccine efficacy (3-32%) Doubt that influenza is a serious disease (2-32%). Hoffman et al. Infection, 2005; 34:
54 Mandatory Vaccine :
55 Influenza-Prevention Vaccination is the most effective way to prevent the disease Follow proper infection control practice Regular hand hygiene Good respiratory hygiene Early self-isolation of those having influenza symptoms Avoid close contact with sick people
56 THANK YOU
57 References Centers for Disease Control and Prevention. Key Facts About Seasonal Influenza (Flu). Centers for Disease Control and Prevention. March 11, Gu Y, Komiya N, Kamiya H, Yasui Y, Taniguchi K, Okabe N. Pandemic (H1N1) 2009 transmission during presymptomatic phase, Japan. Emerg Infect Dis Sep. 17(9): [ Guharoy R, Gilroy SA, Noviasky JA, Ference J. West Nile virus infection. Am J Health Syst Pharm Jun (12): Jefferson T, Di Pietrantonj C, Rivetti A, Bawazeer GA, Al-Ansary LA, Ferroni E. Vaccines for preventing influenza in healthy adults. Cochrane Database Syst Rev Jul 7. CD Brooks M. FDA Okays 4-Strain Seasonal Influenza Vaccine. Medscape Medical News. December 17, March 5, FDA approves first quadrivalent vaccine to prevent seasonal influenza. US Food & Drug Administration, February 29, March 11, FDA Approves First U.S. Vaccine for Humans Against the Avian Influenza Virus H5N1. Center for Disease Control and Prevention.March 11, [Guideline] Grohskopf LA, Sokolow LZ, Broder KR, Walter EB, Fry AM, Jernigan DB. Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices-United States, Influenza Season. MMWR Recomm Rep Aug (3):1-20.
58 References Flu Vaccine and People with Egg Allergies. Centers for Disease Control and Prevention (CDC2016 Sep 2; August 16, Lee V, Yap J, Cook AR, et al. Effectiveness of public health measures in mitigating pandemic influenza spread: a prospective sero-epidemiological cohort study. J Infect Dis Nov (9): Kilbourne ED. Influenza pandemics of the 20th century. Emerg Infect Dis Jan. 12(1):9-14. Seasonal Influenza (Flu): Guidance for Clinicians on the Use of RT-PCR and Other Molecular Assays for Diagnosis of Influenza Virus Infection. Centers for Disease Control and Prevention. March 13, Gubareva LV, Kaiser L, Hayden FG. Influenza virus neuraminidase inhibitors. Lancet Mar (9206): Drake JW. Rates of spontaneous mutation among RNA viruses. Proc Natl Acad Sci U S A May 1. 90(9): Avian influenza ("bird flu"): fact sheet. World Health Organization. August 14, 2012.
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