@Dymaxion People with autism went one of two ways during the pandemic.
- Anxiety was heightened and they couldn’t cope with changes in routine which increased their stress.
- Anxiety lowered due to much fewer social expectations and a constant environment decreasing stress.
I would suspect OP’s husband was the latter. Which would explain why his health was better during lockdowns.
Also, with covid or any virus, could be due to threshold not being met for infection.
For example in the real world you might be on a bus/train for 30-40 mins in the morning (confined environment) with 30-100 people and 20% of them might have covid so you have multiple exposures to viral particles, then you go to your workplace and again have multiple exposures, you need to go to tesco to buy some bits for tea and again have multiple exposures, then you’ve got the public transport home again…. By the time you have got home or after a few days of this where the virus is circulating at high level you have had so much exposure your body can’t fight it off and you meet the threshold to develop the infection yourself.
Meeting that threshold comes about due to viral (strain, replication rate, ability to persist in the environment etc), host (previous exposure, immune system, sex etc) and environmental factors (temperature, social distancing, hand hygiene etc.) combined.
Arguably, the OP’s husband was at substantially less risk in a house with a single person infected who likely was isolating in their room with a window open or at least wearing a mask…. Than he would be now in environments such as OP described with no social distancing, being exposed to large numbers of people who will have higher levels of infection themselves after limited exposure to viruses over the last few years.