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In the U.S., COVID-19 hospitalizations and deaths are overall significantly lower, but there are hot spots of surging infections attributable to the Delta variant.
In May 2022, a preprint indicated Omicron subvariants BA.4 and BA.5 could cause a large share of COVID-19 reinfections, beyond the increase of reinfections caused by the Omicron lineage, even for people who were infected by Omicron BA.1 due to increases in immune evasion, especially for the unvaccinated. However, the observed escape of BA.4 and ...
Experts say that groups such as the elderly, pregnant women, people with preexisting conditions and the immunocompromised are particularly susceptible to complications from the virus and are ...
The Delta variant (B.1.617.2) was [3] [4] a variant of SARS-CoV-2, the virus that causes COVID-19. It was first detected in India on 5 October 2020. It was first detected in India on 5 October 2020. The Delta variant was named on 31 May 2021 and had spread to over 179 countries by 22 November 2021.
Indeed, early research suggested that though omicron spread much faster than the delta variant, it appeared to cause less severe disease. Full coverage of the Covid-19 pandemic
In May 2022, a preprint indicated Omicron subvariants BA.4 and BA.5 could cause a large share of COVID-19 reinfections, beyond the increase of reinfections caused by the Omicron lineage, even for people who were infected by Omicron BA.1 due to increases in immune evasion, especially for the unvaccinated. However, the observed escape of BA.4 and ...
Murine typhus, a rare infection (20-100 cases a year in the U.S.) caused by the bacterium Rickettsia typhi and transmitted by the feces of cat or rat fleas coming in contact with a break in the ...
Fleas can transmit Rickettsia typhi, Rickettsia felis, Bartonella henselae, and the myxomatosis virus. [ 35 ] : 73 They can carry Hymenolepiasis tapeworms [ 37 ] and Trypanosome protozoans. [ 35 ] : 74 The chigoe flea or jigger ( Tunga penetrans ) causes the disease tungiasis , a major public health problem around the world. [ 38 ]