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NOpen questions about norovirus

Norovirus ? A very-low-dose gut virus of schools and ships — soap and bleach surfaces, not alcohol-gel faith.

A durable vaccine is hard because genotypes turn over and immunity is short.

Culture systems improved in research labs. This page still will not provide them.

Open questions

Will a vaccine cover enough genotypes?

Multivalent ideas exist. Durability is the open bet.

How long should food workers stay out?

Rules differ. Shedding data keep revising the boring number of days.

What surfaces matter most?

Rails, bathroom taps and carpets after vomit are research and leaflet favorites.

Can we forecast the next GII wave?

Sequence surveillance tries. Surprises still appear.

How do oysters get clean enough?

Depuration and harvest-water rules are the policy tools, not a home rinse myth.

The frontier is fewer closed-room chains.

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