SSPE

Of the cases reported following the measles resurgence that ended in 1991, one in every 609 children under the age of 12 months at the time they contracted measles eventually came down with SSPE.

There can also be long-term complications from measles, such as SSPE, which stands for subacute sclerosing panencephalitis.

And a complication known as subacute sclerosing panencephalitis, or SSPE, may emerge from dormancy years later.

When they extrapolated out from the relationship between the cases of measles and the cases of SSPE, they found that for children under a year, the rate was 1 in 600.

Babies younger than that can be infected with measles and later develop this complication, which is called subacute sclerosing panencephalitis, or SSPE.