Posted by John Nichols on September 16, 2020 at 06:48:26 user Mcneacail.
In Reply to: Re: The Government's new Rule of Six posted by Mike Field on September 15, 2020 at 17:26:00:
The mumps virus replicates in the upper respiratory tract and is transmitted person to person through direct contact with saliva or respiratory droplets of a person infected with mumps. The risk of spreading the virus increases the longer and the closer the contact a person has with someone who has mumps. The infectious period is considered from 2 days before to 5 days after parotitis onset, although virus has been isolated from saliva as early as 7 days prior to and up to 9 days after parotitis onset.
The entire population at the time would have been aware of the symptoms of measles and a range of other common diseases. You have to assume that Nancy's mother would have been able to spot parotitis so the problem period is 2 days, she woke up with it, so a 1.5 days.
The day before is the Igloo, so glove wearing -- it is a stat chance she passed it on
Mumps is a highly contagious infection with an R0 of 10–12 in a susceptible population. Prior to the introduction of routine mumps vaccination, 95% of adults had serological evidence of infection, and regular seasonal outbreaks occurred every 2-5 years, mainly affecting children
But they are outside the age range for usual mumps onset, 5 to 9 and most likely some had already had it - it can be asymptomatic.
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