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Related Concept Videos

Dosage Regimen: Individualization01:24

Dosage Regimen: Individualization

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Individualization in dosing regimens is the customization of medication doses for individual patients. Its necessity arises from the goal of maximizing therapeutic benefits while minimizing risks. This approach is pivotal because human responses to drugs can vary widely; what is effective for one person may be inadequate or excessive for another. Interpatient (intersubject) variability refers to differences in drug responses between individuals, while intrapatient (intrasubject) variability...
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Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
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Drug Dosing: Infants and Children01:29

Drug Dosing: Infants and Children

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Pediatric patient dosages diverge from adults due to disparities in body surface area, total body water, and extracellular fluid per kilogram of body weight. The dosing regimen considers the variations in pharmacokinetics and pharmacology across distinct age groups, encompassing preterm newborns, infants, young children, older children, and adolescents. Calculation of pediatric patient doses is predicated on determining body surface area, which exhibits a superior correlation with the child's...
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Dosage Regimen: Fixed Dose01:01

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Fixed-dose regimens are a common approach to administer drugs to achieve and maintain desired levels of the drug in the body. In this dosing strategy, a specific amount of medication is given at regular intervals, often multiple times a day, to ensure a consistent drug concentration in the bloodstream.
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Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
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Opsono-Adherence Assay to Evaluate Functional Antibodies in Vaccine Development Against Bacillus anthracis and Other Encapsulated Pathogens
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Diphtheria boosters for adults: balancing risks.

Claire Cameron1, Joanne White, Deirdre Power

  • 1Immunisation Department, Health Protection Agency Centre for Infections, 61 Colindale Avenue, London NW9 5EQ, UK. Claire.Cameron@hpa.org.uk

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Combined tetanus-diphtheria vaccines protect adults. Risk assessment for vaccination depends on individual history and travel, with few contraindications beyond anaphylaxis.

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Area of Science:

  • Immunology
  • Public Health
  • Vaccinology

Background:

  • Combined tetanus-diphtheria vaccines are the sole method for adult protection against these diseases.
  • Clinicians must weigh the benefits and risks of each vaccine component when advising patients.
  • Questions persist regarding the optimal risk-benefit balance for different patient populations.

Purpose of the Study:

  • To evaluate the risk-benefit balance of combined tetanus-diphtheria vaccination in adults.
  • To provide guidance on vaccination strategies based on individual risk factors and geographical exposure.
  • To clarify contraindications and recommendations for booster doses.

Main Methods:

  • Review of existing vaccination guidelines and epidemiological data.
  • Analysis of risk factors associated with tetanus and diphtheria exposure.
  • Assessment of vaccine efficacy and safety profiles.

Main Results:

  • Five doses of diphtheria toxoid vaccine likely provide sufficient protection in low-incidence countries.
  • Adults in the UK have a very low risk of diphtheria exposure, influencing risk-benefit assessment for incomplete vaccination schedules.
  • Lifelong tetanus risk favors vaccination even with up-to-date diphtheria status if tetanus doses are insufficient.
  • Booster doses are recommended for travelers to endemic areas if over 10 years since last dose.
  • Further boosters are generally safe for individuals with five or more prior tetanus doses.

Conclusions:

  • Vaccination decisions for combined tetanus-diphtheria vaccines require individualized risk assessment.
  • Anaphylaxis to diphtheria or tetanus toxoid is the only absolute contraindication.
  • Patients with a history of anaphylaxis should receive comprehensive counseling on disease risks and treatment.