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Coronavirus: How can I shop or get deliveries and takeaways safely?

Remember a time - just a few weeks ago - when a trip to the supermarket wasn't restricted to the "basic necessities" to be done "as infrequently as possible"?

Those were the words Boris Johnson used about the new approach to shopping as he outlined the government's curbs on daily life, to limit the spread of coronavirus. He said people should "use food delivery services where you can".

But what are the safest ways to go shopping for food or accept a delivery or takeaway at home?

What's the risk in shops?

Coronavirus spreads when an infected person coughs small droplets - packed with the virus - into the air. These can cause an infection if they are breathed in, or potentially if you touch a surface they have landed on.

So going shopping and mixing with other people does carry a risk. That is why social distancing - keeping at least 2m (about 6ft) from others - is so important, and many shops are enforcing it.

Supermarkets can provide an "ideal setting" for virus transfer, says Prof Sally Bloomfield, of the London School of Hygiene and Tropical Medicine. "Many people are touching and replacing items, checkout belts, cash cards, car park ticket machine buttons, ATM payment buttons, paper receipts etc... Not to mention being in the proximity of several other people."

There are ways to offset these risks:

  • Wash hands for 20 seconds with soap and water, or with alcohol-based hand sanitiser before and after shopping

  • Treat surfaces as if they may be contaminated, meaning you avoid touching your face after handling shopping trollies, baskets, packages and produce

  • Use contactless payment methods

What about the shopping itself?

There is no evidence of Covid-19 being transmitted through food, and thorough cooking will kill the virus. The UK Food Standards Agency website has advice on food safety at home.

But while there is no such thing as "zero risk", says Prof Bloomfield, it is packaging - handled by other people - that is a chief concern.

Online advice for food businesses says: "Food packaging is not known to present a specific risk." However, some independent experts have additional advice.

"For contained or packaged goods," says Prof Bloomfield, "either store them for 72 hours before using them or spray and wipe plastic or glass containers with bleach [that is carefully diluted as directed on the bottle].

"For unwrapped fresh goods, which could have been handled by anyone - wash thoroughly under running water and leave to dry," she adds.

How safe are home deliveries?

Delivery slots permitting, a home drop is less risky than a trip to a supermarket as you will avoid other shoppers. The risk is possible contamination of the surface of any food or package, or from the delivery driver.

Food safety expert and blogger Dr Lisa Ackerley suggests leaving a note on your front door asking the driver to ring the bell and step back. This would allow you to safely pick up your food, alone.

What about the networks of volunteers springing up to help local vulnerable and elderly people?

To remove any fear of the virus being on surfaces, Dr James Gill, of Warwick Medical School, advises: "Wiping over surfaces with simple diluted household bleach will inactivate the virus within one minute."

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