It's an aerially transmitted virus, so I do not think dancing is actually any more risky than any other event where people are circulating in a crowded space.
I'm left with the uncomfortable feeling that this is a
rather irresponsible statement.
It's much worse than merely being an aerially transmitted
virus, it's virulent and it "hides". Contamination can be
picked up from surfaces where infected droplets have landed
but also from surfaces that an infected person has touched.
That contamination has to be transferred to the mouth
or even the eyes, presumably by touch. That's why hand
washing is emphasised so much.
But in dance that contamination can easily and accidentally
be passed direct, body to body. And what about sweat emitted
or even projected in active dances? Even in relatively restrained
Tango there are men who sweat enough to have wet shirt backs
and there are women with wet fronts (let's not go any further
with that one). And then there are women who turn their head
and thus their face towards their partner, a nasty habit copied
from show dancing and not at all appropriate for social dance.
Of course people circulating in any crowded space
is a risk right now, so such events are banned, probably
for the forseeable future. But you seem to be implying
that dance could be included in any relaxation.
I would certainly disagree with that, and perhaps so will others
with a stronger sense of responsibility and self-preservation.
Therefore I think a likely intermediate stage that will effectively reduce transmission is actual enforcement that people with a persistent cough or fever must self-quarantine. This won't stop asymptomatic spreaders, but if there is a large proportion of those then we're probably a lot further down the curve than we think.
Surely we already know by now that waiting for symptoms
to show is one of the reasons why this infection spreads.
That is far too late.
The self-imposed self-isolating of the possibly symptomatic
infected doesn't really work and cannot be enforced.
I see little hope of an end anytime soon, physical distancing
and more quarantines if necessary are the immediate and
continuing future. Until modern medicine finds a solution.
If there are any asymptomatic but innocent spreaders at a dance,
then other dancers are likely to be infected. There is plenty of
evidence in Argentina and Uruguay of the virus being spread
by asymptomatic people who have attended family celebrations
by breaking the quarantine in one way or another.
Let's face it:
there can be no Tango during the time of this Pandemic.
The same applies to all other group dancing and classes
whether it be for dance or for other forms of exercise.