variolations造句

• As vaccination gained acceptance, variolation gradually fell out of favor.
• Various countries made variolation illegal, starting with Russia in 1805.
• Variolation served as a natural precursor to the discovery of vaccination.
• Variolation was prohibited in 1840, and vaccination was mandated in 1854.
• The technique, call variolation, arrived in Europe in the early 1700s.
• Because of associated deaths, variolation was declared illegal in the same year.
• France was the last European country to embrace variolation.
• The main arguments against variolation were on religious grounds.
• The success of these variolations assured the British people that the procedure was safe.
• Despite some opposition vaccination took over from variolation.
• Stimulated by a severe epidemic, variolation was first employed in North America in 1721.
• But people undergoing variolation felt well enough to be out and about _ while fully contagious.
• To create immunity, Americans turned to variolation, in which smallpox was inserted through the skin.
• A very early form of vaccination known as variolation was developed several thousand years ago in China.
• The patriarch Robert Sutton was a surgeon from Suffolk who began experimenting with the practice of variolation.
• The simplest debate argued that variolation was ungodly because it was not mentioned specifically in the Bible.
• Its implementation at the time was impractical for logistical reasons and the risk that variolation would spread smallpox.
• The term " variolation " was then used from the 19th century to avoid confusion with vaccination.
• The use of variolation soon began to decline as the smallpox vaccine became widely used and its benefits appreciated.
• The variolation available to the rich ended up making things worse for those who could not afford to buy immunity.