CDC Pneumonia Vaccine Recommendation Calculator
This calculator helps adults determine which pneumococcal vaccines might be recommended for them based on current CDC guidelines (as of late 2023/early 2024). Pneumococcal disease, caused by Streptococcus pneumoniae bacteria, can lead to serious infections like pneumonia, meningitis, and bloodstream infections. Vaccination is a key preventive measure.
Understanding Pneumococcal Vaccines
There are several types of pneumococcal vaccines available for adults:
- PCV13 (Prevnar 13): Protects against 13 types of pneumococcal bacteria.
- PPSV23 (Pneumovax 23): Protects against 23 types of pneumococcal bacteria.
- PCV15 (Vaxneuvance): Protects against 15 types of pneumococcal bacteria.
- PCV20 (Prevnar 20): Protects against 20 types of pneumococcal bacteria.
The choice and sequence of vaccines depend on your age, health conditions, and previous vaccination history. This calculator provides general guidance, but always consult with a healthcare professional for personalized medical advice.
Your Information
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function toggleYearsSinceLastDose() {
var prevType = document.getElementById('prevVaccineType').value;
var yearsInputDiv = document.getElementById('yearsSinceLastDoseDiv');
if (prevType === 'None') {
yearsInputDiv.style.display = 'none';
} else {
yearsInputDiv.style.display = 'block';
}
}
function calculatePneumoniaVaccine() {
var age = parseInt(document.getElementById('currentAge').value);
if (isNaN(age) || age 120) {
document.getElementById('result').innerHTML = 'Please enter a valid age between 18 and 120.';
return;
}
var hasChronicHeartDisease = document.getElementById('hasChronicHeartDisease').checked;
var hasChronicLungDisease = document.getElementById('hasChronicLungDisease').checked;
var hasChronicLiverDisease = document.getElementById('hasChronicLiverDisease').checked;
var hasChronicKidneyDisease = document.getElementById('hasChronicKidneyDisease').checked;
var hasDiabetes = document.getElementById('hasDiabetes').checked;
var hasAlcoholism = document.getElementById('hasAlcoholism').checked;
var isSmoker = document.getElementById('isSmoker').checked;
var hasImmunocompromisingCondition = document.getElementById('hasImmunocompromisingCondition').checked;
var hasAnyRiskFactor = hasChronicHeartDisease || hasChronicLungDisease || hasChronicLiverDisease ||
hasChronicKidneyDisease || hasDiabetes || hasAlcoholism || isSmoker ||
hasImmunocompromisingCondition;
var isHighRiskAdult = (age >= 65) || (age >= 19 && age <= 64 && hasAnyRiskFactor);
var prevType = document.getElementById('prevVaccineType').value;
var yearsSinceLast = parseFloat(document.getElementById('yearsSinceLastDose').value);
var recommendations = [];
var intervalForPPSV23 = hasImmunocompromisingCondition ? 0.16 : 1; // 8 weeks is approx 0.16 years, 1 year
if (!isHighRiskAdult) {
recommendations.push("No routine pneumococcal vaccination is recommended for healthy adults under 65 years old. Consult your doctor if you have specific concerns or travel plans.");
} else {
if (prevType === 'None') {
recommendations.push("You should receive either
PCV20 OR
PCV15 followed by PPSV23.");
recommendations.push("If you choose PCV15, PPSV23 should be given at least " + (hasImmunocompromisingCondition ? "8 weeks" : "1 year") + " after PCV15.");
} else if (prevType === 'PCV13_only') {
if (isNaN(yearsSinceLast) || yearsSinceLast < 1) {
recommendations.push("You should receive
PPSV23 at least 1 year after your PCV13 dose.");
} else {
recommendations.push("You should receive
PPSV23.");
}
} else if (prevType === 'PPSV23_only') {
if (isNaN(yearsSinceLast) || yearsSinceLast < 1) {
recommendations.push("You should receive
PCV20 OR
PCV15 at least 1 year after your PPSV23 dose.");
recommendations.push("If you choose PCV15, you would then need PPSV23 at least " + (hasImmunocompromisingCondition ? "8 weeks" : "1 year") + " after PCV15 (provided you haven't had PCV13 or PCV15 previously).");
} else {
recommendations.push("You should receive either
PCV20 OR
PCV15.");
recommendations.push("If you choose PCV15, you would then need PPSV23 at least " + (hasImmunocompromisingCondition ? "8 weeks" : "1 year") + " after PCV15 (provided you haven't had PCV13 or PCV15 previously).");
}
} else if (prevType === 'PCV15_only') {
if (isNaN(yearsSinceLast) || yearsSinceLast < intervalForPPSV23) {
recommendations.push("You should receive
PPSV23 at least " + (hasImmunocompromisingCondition ? "8 weeks" : "1 year") + " after your PCV15 dose.");
} else {
recommendations.push("You should receive
PPSV23.");
}
} else if (prevType === 'PCV20_only' || prevType === 'PCV13_then_PPSV23') {
recommendations.push("No further routine pneumococcal vaccination is currently recommended.");
}
}
var resultHtml = ";
if (recommendations.length === 0) {
resultHtml = 'Could not determine a recommendation. Please ensure all fields are correctly filled.';
} else {
for (var i = 0; i < recommendations.length; i++) {
resultHtml += '' + recommendations[i] + '';
}
}
document.getElementById('result').innerHTML = resultHtml;
}
// Initial call to set visibility on page load
window.onload = toggleYearsSinceLastDose;