Petera
Baggs
Callistemon21
By the way how do you know that your immune system is healthy? There is no way of measuring it
Well, there is but it would require regular blood tests.
I base my judgment of mine on historical references such as natural immunity to rubella and TB. I presume my immune system must have encountered them at some point unknown and told them where to get off.
1.5 million people died of TB in 2020, it's the second highest infection killer after COVID and presumably poised to regain first place. TB is still classed as an epidemic.
The reason you are unlikely to catch it is not because you have a better immune system than these people who died, but because you live in a society where - if it occurs, and it does - it is treated rapidly and therefore the risk of transmission from person to person is significantly lower. Bacterial infections are typically treated by antibiotics after the event, in the COVID case the viral infection can be controlled before you even catch it – sounds like a win-win to me.
And the number of diseases that have been eliminated worldwide is vanishingly small. So small that nearly everyone can name it. A handful (literally) of other diseases - Polio, Diphtheria, Yellow Fever, Malaria and Measles (now making a strong comeback thanks to Andrew Bloody Wakefield) - have been all but eradicated in the ‘West’ but it’s only kept that way by vigilance, not by our immune systems.
As for all the others, people still catch them and have to be treated – TB, Black Death, Scarlet Fever, whooping cough - they’re all still here.
I understand what you're saying, petera, but where would my immunity to TB have come from if I hadn't been exposed to it somehow and without having been vaccinated?
Similarly with rubella.
I have never had the BCG or rubella vaccines but according to tests I have immunity to both.
Please note, I only haven't had those vaccines because I was already immune when I would otherwise have been getting them. Everyone else in my year at school got the BCG vaccine. I didn't need it. I didn't need it two and a half decades later either when I was planning to work in a country where it was rife.
Rubella vaccine only became routinely available in the school year after mine but a blood test when I first got married showed I was already immune to that too, so presumably, in both cases, I had "caught" the diseases and, luckily, dealt with them without anyone knowing I was infected.
If there is a better explanation I'll be happy to hear it.