often attributive
: a serotype of haemophilus (Haemophilus influenzae type B) that causes bacterial meningitis and pneumonia especially in children
Hib disease
Hib vaccine
Examples of Hib in a Sentence
Recent Examples on the Web
The vaccines the state no longer plans to mandate are varicella (chickenpox), Hepatitis B, Haemophilus influenzae type b (Hib), and Pneumococcal conjugate (PCV15/20).
—
Cindy Krischer Goodman, The Orlando Sentinel, 16 Apr. 2026
New cases in unvaccinated kids feed concern that Hib may have a resurgence.
—Eduardo Cuevas, USA Today, 4 Apr. 2026
It’s been almost a year since Ashlee Dahlberg lost her 8-year-old son, Liam, to Hib.
—Erika Edwards, NBC news, 2 Apr. 2026
Like Ratner encountering his first patient with Hib, the German doctors had never seen diphtheria before.
—Patricia Callahan, ProPublica, 19 Mar. 2026
The vaccines the state no longer plans to mandate are for varicella, or chickenpox; Hepatitis B; Haemophilus influenzae type b, or Hib; and Pneumococcal conjugate, or PCV15/20.
State law still would require vaccines for polio, measles, mumps, rubella, diphtheria, pertussis and tetanus.
—Romy Ellenbogen, Miami Herald, 5 Mar. 2026
Before vaccines were introduced in the latter half of the 1980s, about 20,000 children a year in the U.S. developed the more serious forms of Hib, where the infection moves into other organ systems.
—Helen Branswell, STAT, 2 Mar. 2026
In December, the Department of Health took a step toward eliminating four vaccines required to attend school: Varicella, or chickenpox; Hepatitis B; Haemophilus influenzae type b, or Hib; and Pneumococcal conjugate, or PCV15/20.
—Christopher O'Donnell, Sun Sentinel, 26 Jan. 2026
The Hib conjugate vaccine was licensed for use in infants in 1990, and within five years Hib disease in young children dropped by more than 99%.
—Jake Scott, CNN Money, 19 Dec. 2025
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Cindy Krischer Goodman, The Orlando Sentinel, 16 Apr. 2026
New cases in unvaccinated kids feed concern that Hib may have a resurgence.
—Eduardo Cuevas, USA Today, 4 Apr. 2026
It’s been almost a year since Ashlee Dahlberg lost her 8-year-old son, Liam, to Hib.
—Erika Edwards, NBC news, 2 Apr. 2026
Like Ratner encountering his first patient with Hib, the German doctors had never seen diphtheria before.
—Patricia Callahan, ProPublica, 19 Mar. 2026
The vaccines the state no longer plans to mandate are for varicella, or chickenpox; Hepatitis B; Haemophilus influenzae type b, or Hib; and Pneumococcal conjugate, or PCV15/20.
State law still would require vaccines for polio, measles, mumps, rubella, diphtheria, pertussis and tetanus.
—Romy Ellenbogen, Miami Herald, 5 Mar. 2026
Before vaccines were introduced in the latter half of the 1980s, about 20,000 children a year in the U.S. developed the more serious forms of Hib, where the infection moves into other organ systems.
—Helen Branswell, STAT, 2 Mar. 2026
In December, the Department of Health took a step toward eliminating four vaccines required to attend school: Varicella, or chickenpox; Hepatitis B; Haemophilus influenzae type b, or Hib; and Pneumococcal conjugate, or PCV15/20.
—Christopher O'Donnell, Sun Sentinel, 26 Jan. 2026
The Hib conjugate vaccine was licensed for use in infants in 1990, and within five years Hib disease in young children dropped by more than 99%.
—Jake Scott, CNN Money, 19 Dec. 2025
Cite this Entry
“Hib.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Hib. Accessed 24 Apr. 2026.
Copy CitationMedical Definition
Hib
nounoften attributive
: a serotype of a bacterium of the genus Haemophilus (H. influenzae type B) that causes bacterial meningitis and pneumonia especially in children
Hib disease
a Hib vaccine
see conjugate vaccine
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