The precautionary principle seems unarguable, doesn't it? If it might be risky, don't…
But in practice, people often look at the risk that interests them. Head injuries from cycling. GI infections from streams. Zoonoses from pets or farm animals.
2/7
You can end up with disproportionate and even harmful responses.
Put people off cycling and you reduce all the benefits from cycling and do, overall, more harm.
Ban pets and - well,, there'd be a rebellion.
3/7
Stop visits to petting farms or keep the animals so remote they're not interesting…
4/7
You get the picture.
We have to mitigate risks, and reduce them where we can. An egg or a carrot which isn't contaminated with poisons or pathogens tastes just as good; but trying to eliminate all risks is bad for your phy and mental health.
5/7
It occurred to me that pet ownership might be a useful metaphor for teaching these concepts. Look at the risks (zoonoses, injuries…) of pet ownership, the benefits, and the way to mitigate risks to a level you (and society) can accept.
6/7
Is anyone taken {or been aware of others taking) this approach to reaching about risk, risk mitigation, and proportionality?
7/7
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I was pleased to hear that @theRCN calls for better PPE (specifically, for higher specification masks) were the lead item on the news this morning. This shameful andegregious failure to protect staff will no doubt feature in the eventual public enquiry.
1/8
We, at @TheBMA, have been calling for this for many months now.
There is no "low risk" patient-facing setting. I am horrified whenever I go into a hospital.
2/8
This is me, wearing the sort of mask worn by NHS staff. A "fluid-resistant surgical mask" or FRSM as the guidance calls them. This mask is better-fitting than many I've seen on staff; and I'm wearing it, correctly, properly covering my nose and chin. 3/8
@Fifino9 has managed a couple of improvements, too.
1/9
Attending her GP (family doctor) for her Covid-19 vaccine, the guy in the queue behind her wasn't wearing a mask and was coughing heavily. The volunteer receptionist was wearing a cloth mask.
2/9
Since her letter, they've changed their policies. People with symptoms (even if it's a chronic cough) and those who won't or can't wear a mask are seen separately, away from other patients. And all staff and volunteers wear proper surgical masks.
3/9
What we (UK) most urgently need to do is to:
a) Cut transmission globally (to reduce mutation and the arrival of variants that evade the immune system and vaccines)
b) Cut the number of people in the UK who get ill enough to be admitted to hospital…
1/9
c) Cut transmission in the UK, see a) above, and to reduce eg #LongCovid
Vaccines - especially when given first to those most likely to get seriously ill and require hospital admissions - will definitely help with b). They are good at preventing serious illness.
2/9
But we still don't really know how effective vaccines are at preventing transmission. And, with variant viruses which are more transmissible than the variant that we had a year ago, it's not clear that vaccines will ever bring Re below 1 without additional restrictions.
3/9
This is a great thread with some useful-for-explaining metaphors on how immunity works and how it can be dysfunctional. It left me wanting to know more about…
… It left me wanting to know more about how an immune system, primed to recognise an antigen, is less susceptible to the "cytokine storm" overreaction which is responsible for severe Covid-19 disease.
I would also like to know more about immunity and #LongCovid.
1/6 Thread by @Dr_D_Robertson: The Home Secretary has suggested that police should get higher priority in vaccinations. There is an article in the @guardian where this is clarified JCVI has set out their recommendation...… threadreaderapp.com/thread/1351848…
2/6 Of course, there's a traditional way of rationalising these decisions. Risk is product of bad event, and likelihood of event happening. Some occupations - people providing necessary services where contact with large numbers is unavoidable, will be at higher risk.
3/6 They include HCWs, teachers, transport workers, teachers…
Their risk will be raised, compared to other people of the same age, sex, and health, because their exposure, their risk of being infected, is higher.