Many science and news websites have debunked this before. Consuming acidic drinks like lemon juice has no effect on coronavirus infections. Viral infections spread in your body when viruses enter your cells and make copies of themselves and then those copies enter new cells and repeat the process. Lemon juice will not destroy viruses in your body or stop the copying process. Read more here: https://www.nationalacademies.org/based-on-science/lemon-juice-does-not-cure-covid-19.