The author, after 4 years, is probably still afraid of contracting Covid from you; given that she spend more than a paragraph complaining about absent distancing.
Source: https://www.thelancet.com/journals/lanepe/article/PIIS2666-7...
On top of that, long covid remains a serious concern, and rates of long covid remain steady: https://www.thelancet.com/journals/eclinm/article/PIIS2589-5...
COVID also increases autoimmune disease risk by up to 40%, which can have life altering impacts. Source: https://www.medrxiv.org/content/10.1101/2023.01.25.23285014v...
Given the author may be from a place with poor healthcare that doesn't support the disease or autoimmune diseases well (e.g. the U.S.) or may be close to someone with a weakened immune system, it's very reasonable for some people to be cautious about covid.