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Having recently observed World Immunization Week, let’s review the history of vaccination. One thousand years ago, when a wave of smallpox hit India, something extraordinary happened: People lined up to buy the disease. Healers used a cloth to rub a healthy person’s upper arm. Then, they’d scratch it — just enough to draw blood. The healers would then apply dried smallpox scabs to the area. But here’s the thing: They would only apply scabs from smallpox patients who had survived the disease. Though people “vaccinated” this way would often get sick, most would survive infection and go on to build immunity. (Today, most vaccines in use, including the Pfizer, Moderna and Johnson & Johnson Covid-19 vaccines, are not live vaccines and cannot infect you with the virus they inoculate against.)

New south walesVariolae vacciniaeLady mary wortley montaguRichard dunningJames phippsSarah nelmesEdward jennerJohnson covidPublic health law researchWorld immunization weekHealth law researchநிலையான மக்கள்புதியது தெற்கு வேல்ஸ்பெண் மேரி வோர்ட்லி மாஂடக்யூரிச்சர்ட் டந்நிஂக்ஜேம்ஸ் ஃபிப்ஸ்