Immunocompromised status keeps on being a challenge for a neurologist, especially in the context of the coronavirus disease-19 (COVID-19) pandemic. We report a clinical case of a human-immunode ciency virus (HIV)-positive patient who developed an acute transverse myelitis. Magnetic Resonance Imaging (MRI) examination showed longitudinally extensive spinal cord abnormality, and laboratory tests con rmed SARS-CoV-2 infection. The patient responded to methylprednisolone pulse therapy and therapeutic plasma exchange. No cases of HIV-positive patients with myelitis and COVID-19 has been reported yet.

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The combined effect of broad/partial band jamming on the analysis performance of multi-input/multi-output (MIMO) space time block coding (STBC) systems over Rayleigh fading channel is often neglected in the literature. To this end, this paper investigates the impact of different kinds of jamming on the performance of MIMO STBC systems. Closed form expressions for the bit error probability (BEP) of the performance of binary phase shift keying (BPSK) STBC communication system over Rayleigh fading channel under the impact of both partial band and broad-band jamming for different number of transmitting and receiving antennas are presented. Computer simulations are provided to validate the theoretical developments. It has been found that the performance of such systems is severely deteriorated in the presence of strong jamming power (with a signal to jamming power ratio less than − 10dB) and the worst scenario occurs in the presence of broad-band jamming.

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