So many California residents have had Covid now, (I think I saw 1 in 3) that side eyeing people who are out and about is pretty short sighted. We always wear masks and socially distance for everyone’s comfort and safety but the risk we are running is negligible.
A quick and dirty Google search states only 3 mil Californians have been infected. That's about 1 in 13 people or 7.5% of the population. Not quite as high as the 33% you are suggesting.
Just an FYI,
Source of study (not studies): "A preprint, unpublished non-peer reviewed work, from the
SIREN (Sarscov2 Immunity & REinfection EvaluatioN) study compares SARS-CoV-2 infection rates in antibody positive and antibody negative healthcare workers."
1. This study has only been going on for 5 months which is why the current prognosis is that immunity could last
at least 5 months. They will continue the study for up to 12 months to ascertain if immunity on average is longer.
2. In the initial 5 months in this study, "
Reinfection was rare (44 potential reinfections out of 6,614 participants who had tested positive for antibodies)"
3. "Of the 44 potential reinfections identified (by those who had already tested positive), two were designated 'probable' and 42 as 'possible'"
4. Those who appeared reinfected only showed "asymptomatic" infections meaning they didn't show any symptoms of the disease. This leads to preliminary calls for continued caution and to continue wearing masks and social distance, not to scare people into thinking they will fully catch the disease and go through the symptoms again.
5. The only people being tested in this study are frontline health workers who are
continually being exposed to Covid-19 on a daily basis thus increasing their risk of reinfection. This is not from the article but from a response by Paul Hunter, Professor in Medicine, The Norwich School of Medicine, University of East Anglia, “So repeat infections are likely to be common in people who are
continually exposed to infection but they are much less likely to be symptomatic. Nevertheless, we do have to
assume that these asymptomatic infections are still infectious to others albeit less infectious than symptomatic cases.”
All of the results of this study are still preliminary and only preliminary assumptions can be ascertained. It still needs to be completed, peer-reviewed, and published.
The person you are replying to is following what this study suggests, to continue to appropriately wear a mask and social distance. Assuming they aren't frontline medical workers, the preliminary study shows their risk of symptomatic reinfection is unlikely, and as suggested, the risk is negligible.