Phase 2 (moderate)
The second phase of infection begins between the tenth and fourteenth day. A protective immune response is impaired, the immune system was not able to defeat the virus and this had a reproduction and an invasion of the deep respiratory tract, as the lungs.
The hypoxic phase starts; in this phase hospitalization and oxygen administration can be required.
Cardiac involvement and clotting problems could take place in this phase and patients with underlying heart disease could have a greater risk of entering the serious clinical picture. Laboratory tests show a decrease in lymphocytes, an increase in transaminases and a moderate increase in pro-inflammatory markers.
The treatment that could be indicated is a continuous use of anti-viral drugs and, when the respiratory situation worsens, need to be started the support of oxygen and/or use of anti-inflammatory drugs, antibiotics and the administration of LMWH-(Low-molecular-weight-heparin) to prevent thromboembolic events.