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They mutated millions of years before mammal and 200 millions of years since mammal appeared on our planet... and still bird flu is not transmittable from human to human. So my question is: why should that virus to change his behavior right now?

Because they mutate all the time. Coronaviruses are single-strand RNA viruses, which generally mutate orders of magnitude faster faster than double-strand DNA viruses e.g. smallpox.

Long post from above shortly: If you are above 40 yo and below 60-65 yo, and your doctor tells you what you don't need PSA screening - it is right time to change your doctor.

https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2023.1320681/full In my opinion, denying the need for regular PSA screening in men under 60 is a crime. The motives for such denial by state bureaucrats are obvious: reducing costs for social medicine and reducing the burden on health care - it is no coincidence that this point of view was activated precisely during the outbreak of covid - a time when medicine was overloaded. As an individual, any of us should not care whether the system is overloaded or not. "I feel sorry for the state, but I feel even more sorry for myself." Any individual between the ages of 40 and 60, if he wants to live long and happily, should ignore the moans of medical bureaucrats about the unjustified nature of screening - timely screening has reduced the mortality of men in the 40-60 category from prostate cancer by almost 40%. I agree that after 75 years of age, starting PSA screening is quite pointless - if you are diagnosed with cancer, then with a high degree of probability you will die from something other than cancer, because prostate cancer develops very slowly and, as ironic as it may sound, you will not live enough to die from prostate cancer. But if you are impressionable and suspicious - do PSA screening for your own peace of mind, and if the results are alarming, repeat in 3-6 months. You can even do PSA screening yourself by buying a one-time home test at a pharmacy for $2, like those for HIV or Covid. It is important to understand that a positive test is only a reason to repeat it in a few months. Two positive tests are only a reason to talk to a doctor about this topic and undergo (also twice, with a break of 3-6 months) tests for quantitative determination of PSA levels. MRI with contrast makes sense only if the PSA level is high (in my country the threshold is 3). And only if both the blood test and the MRI with contrast show the possible presence of a tumor, only then does it make sense to do a biopsy. This is a truly invasive procedure: from a special "gun" through the rectum, 9 to 16 needles with hooks on the end are simultaneously shot into your prostate and they are pulled out back with samples of your prostate tissue, and then these pieces of your meat are examined under a microscope. And before agreeing to a biopsy, you should weigh what you plan to die from - in 10 years from prostate cancer or in 5 years from anxiety.

I'm intrigued by the Covid vaccine issue. I remember a long queue in Pattaya Royal Garden  as residents received theirs just after the reopening , and yet today- as far as I can discern from  P- there are no nationwide campaigns. Here in the UK, I had my sixth vaccination a few weeks back.. P is annoyingly complacent about it. He's only had two and I've nagged and nagged to no avail. I thought he would receive advice when he went for a routine appointment at his hospital on Sunday....but no; not an issue. At least he wore a mask. Which reminds me to ask whether masks are once again de rigueur among Thais again? Seldom seen in London.