vaccine 3造句

• Slowing the spread has several advantages . 1 ) It avoids overloading the health system ( particularly important for countries in the southern hemisphere, yes I know the OP referred to the northern hemisphere ) 2 ) You buy time for a vaccine 3 ) It avoids panic 4 ) It will hopefully reduce the negative effect of the outbreak on the economy ( many areas including tourism ) . talk ) 09 : 25, 21 July 2009 ( UTC)