Today, the number of "new" cases of the new corona in Tokyo has reached 2,447.

Since yesterday, the number of newly infected people has increased by about 1,000 in one day.

It took us 300 days from April to the end of December to reach 1,000 people/day.

Today, in one day, we achieved the same increase in the number of people (*).

(*) Incidentally, this is not a valid comparison in the strict sense (statistical perspective).

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This kind of phenomenon is often seen in computer simulations (called "exponential growth").

Of course, it has been seen in the real world from time to time, but most often it has occurred in distant, impoverished small countries where we seldom look, and the infection has been contained through the efforts of someone else in the world.

To be frank, it's someone else's problem.

I don't believe .

"I'd experience an "infection explosion" in my own living space"

I was stunned by the sense of unreality.

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When this news came out, I sent the following message on the Ebata family's LINE.

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- The probability of household infection is proportional to the number of infected people (always).

- In our family, the risk is now 20 times higher than it was in July (*).

(*) A news report on July 4 states that "the number of newly infected people in Tokyo has 'risen' to 107.

- When talking with other family members, keep the conversation at a certain distance, do not shout, and keep it to about five minutes.

- The risk of long conversations can be considerably improved by partitioning the table.

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Looking at the partition, which I decided to buy half seriously and half with a story.

From now on, instead of toilet paper and masks,

"there might be a "buyout" of household partitions"

I thought.