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Vaccine of the Week: MMRV - ProQuad - Measles, Mumps, Rubella, Varicella. By Heather Ray Children’s Health Defense (11/10/25, video 36:53; does not include transcript, but you can find one from another combined presentation at 32 min timestamp here: tinyurl.com/373n4z8y)
ProQuad is an MMRV vaccine, commonly administered to children between one and twelve years of age. Heather Ray from CHD’s Science Department discusses this shot and the viruses it claims to protect against — including dosing, ingredients, contraindications, shedding, contagiousness, symptoms and risk factors.
Learn what many parents might not consider and most healthcare professionals fail to mention before administering this shot.
Transcript Summary (Grok ai, edited)
Vaccine Overview ProQuad targeted to protect against measles, mumps, rubella, and varicella zoster (chickenpox).
First dose given at 12-15 months, second at 4-6 years.
Same timeframe as MMR plus varicella.
Dosing is 0.5 ml, not weight-dependent.
Manufactured by Merck, approved in US in 2005 for ages 12 months to 12 years.
Only MMRV vaccine in US.
Recommendations and Changes
CDC now recommends separate MMR and varicella for children under 4 due to increased febrile seizures and measles-like rash with ProQuad as of October 6, 2025.
American Academy of Pediatrics (AAP) still recommends ProQuad for under 4.
ED NOTE AAP is very much captured by the pharmaceutical industry. Examples: 💉 Recommends COVID-19 shots for children 6 months and up and for pregnant women (tinyurl.com/4uhx7hsz). 💉 Recommends puberty blockers for transgender adolescents in puberty (Tanner stages 2–5) and cross-sex hormones from early adolescence, as part of gender-affirming care (tinyurl.com/msm5apbp).Children may receive ProQuad or MMR (MMR2 or Priorix) plus Varivax.
Vaccine Composition Quadrivalent live virus vaccine with attenuated measles, mumps, rubella, and varicella viruses. Risks for those with undiagnosed immune deficiency. Can shed vaccine virus.
Diseases Targeted All contagious via respiratory droplets or direct contact, generally mild in childhood.
ED NOTE
Most childhood are highly treatable with supplements and home care or informed care by a doctor. Physicians for Informed Consent (PIC) offers excellent resources (see Related links). Measles:
Rare in US, <2,100 cases since 2020, 4 deaths since 2015 (death causes unclear or unverifiable).
Symptoms: cold-like, rash, unwell for <1 week.
Rare complications: vomiting, diarrhea, encephalitis, pregnancy issues.
Mumps:
<2,400 cases since 2020, mostly in young adults/vaccinated.
Symptoms: flu-like, swollen glands.
Rare complications: encephalitis, meningitis, hearing loss, swollen ovaries/testicles, miscarriage risk.
Rubella:
<10 cases annually.
Symptoms: mild fever, rash.
Rare complications, severe in pregnancy (congenital rubella syndrome).
Chickenpox:
Mild, self-limiting.
Symptoms: rash, flu-like.
Rare complications: pneumonia, bacterial infection, encephalitis. Higher risk in pregnant women, infants <1 year, immunocompromised.
Efficacy Duration of protection unknown. Efficacy wanes; studies show susceptibility in vaccinated individuals. Breakthrough infections common, can cause outbreaks.
Safety and Warnings
Higher febrile seizures than separate vaccines (1 in 320 kids).
Warnings:
Egg hypersensitivity, thrombocytopenia, HIV+, family immunodeficiency.
Virus shedding up to 29 days via feces, urine, droplets, breast milk, skin lesions.
Avoid salicylates (aspirin) for 6 weeks post-vaccination due to Reye's syndrome risk.
Tylenol risks post-vaccination.
VAERS reports under-capture events.
Clinical trials: higher fever, rash; followed 28-42 days.
Post-marketing adverse events: infections, encephalitis, anemia, anaphylaxis, Guillain-Barre, seizures, vision loss, arthritis, etc.
Not evaluated for carcinogenicity, mutagenicity, fertility impairment.
Ingredients
Live viruses propagated in chick embryo cells, WI-38 human diploid lung fibroblasts (from aborted fetus), MRC-5 cells (from aborted fetus).
Other: sucrose, sorbitol, hydrolyzed gelatin, urea, sodium chloride, sodium phosphate, MSG, recombinant human albumin, sodium bicarbonate, potassium phosphate, potassium chloride, neomycin, bovine calf serum.
Additional Facts
Current MMR levels higher than 1978 tested versions; not safety-tested.
Higher mumps/varicella in ProQuad vs. separates.
Deaths from diseases low pre-vaccine.
Infections self-limiting, rare complications.
Natural infection gives lifelong immunity.
Related:
Physicians for Informed Consent > Education: tinyurl.com/mp3n2fat
Covid Essential Links: tinyurl.com/4x23jysr
MMRV FDA Package Insert: fda.gov/media/147563/do…
